How to recognize scams like "IRS Tax Documents Email Virus"

What kind of email is "IRS Tax Documents"?

We have inspected this email and concluded it is malspam. The message impersonates the Internal Revenue Service (IRS), falsely claiming that official tax documents are available for secure download. The link inside leads to a fraudulent website that delivers a remote access trojan disguised as an Adobe Acrobat installer. This email should be ignored and deleted upon receipt.

"IRS Tax Documents" email virus in detail

This email is crafted to look like an official notice from the Internal Revenue Service. It addresses the recipient as "Dear Taxpayer" and states that IRS tax documents for Tax Year 2025 are ready for secure download. The message includes a prominent "Download Secure Viewer" button and a warning claiming the documents are encrypted and require a special viewer to open them. It even lists a real IRS phone number and a Washington, DC address in the footer to appear more convincing. The real IRS has no connection to this email whatsoever.

Clicking the button takes the victim to a third-party website that mimics an official Adobe Acrobat download page. The site displays a notice claiming that Adobe Reader is not detected or is out of date, and automatically initiates a download. The file that arrives is named Adobe_Install.msi - an approximately 18 MB installer with no actual connection to Adobe.

Running the installer does not set up Adobe software. Instead, it silently deploys TiFlux, a legitimate remote desktop and IT management platform developed by a Brazilian company. After installation, a Portuguese-language confirmation screen briefly appears before the program settles quietly in the background. The software registers in Windows as "Ti Service And Agent" under the publisher name "TiFLUX."

In its intended use, TiFlux is a professional remote support tool. Installed without the user's knowledge through this campaign, it effectively becomes a remote access trojan in the hands of the attackers. There is also the possibility that this is a trojanized version of TiFlux, modified to include additional malicious functionality beyond standard remote access.

Once remote access is established, those behind the attack can browse and steal files, intercept passwords, access banking sessions, install further malware, or use the computer for other malicious purposes. Anyone who has run this installer should treat their device as compromised and perform a full antivirus scan immediately.

Malspam campaign examples

In summary, this email is a scam that impersonates the IRS to trick recipients into downloading a remote access tool. The link in the message points to a fake Adobe Acrobat page, and running the downloaded file silently installs TiFlux - granting the attackers remote control over the victim's computer. Such emails should always be deleted without interacting with any links or files they contain.

Hotel Room Upgrade, Login Notice: Review Immediately, and FedEx Express - Your Shipments Were Received are just a few examples of similar malspam campaigns we have analyzed. Spam mail is routinely used to spread all kinds of malware - from remote access trojans and information stealers to ransomware and banking trojans.

How do spam campaigns infect computers?

Spam emails spread malware through two main methods: malicious file attachments and embedded links. Attachments can take many forms - executable files, Microsoft Office documents, ZIP or RAR archives, PDF files, ISO images, script files, and others. Some infect the system the moment they are opened; others require additional steps from the user, such as enabling macro commands in Office documents before malware activates.

Links in spam emails typically redirect to deceptive websites designed to resemble legitimate software pages, document portals, or file-sharing services. In some cases the download starts automatically; in others, the page tricks the user into running a file manually. Either way, the intended outcome is malware installation without the victim realizing what has happened.

How to avoid installation of malware?

Treat unexpected emails with skepticism, particularly those urging you to download software or open files. Legitimate government agencies such as the IRS do not send software installers via email, and no real organization requires you to install a custom viewer to access documents. If an email seems unusual, do not click any links or download any files it contains.

Only download software from official developer websites and trusted sources. Avoid pirated programs, key generators, and software cracks - these are a common delivery method for malware. Keep your operating system and applications updated, and use a reputable antivirus tool to scan your system regularly.

If you have already followed a link or run a file from a suspicious email, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate any infiltrated malware.

Text presented in the "IRS Tax Documents" email letter:

Subject: New Tax Document Ready for View

IRS
Your Tax Documents Are Ready

Dear Taxpayer,

Your official IRS tax documents for Tax Year 2025 are now available for secure download.
Tax records updated: Please review and download your documents.
[Download Secure Viewer]

Security Notice: Your tax documents are encrypted and require our secure viewer to access.

If you need assistance, contact IRS Customer Service at 1-800-829-1040.

Sincerely,
Internal Revenue Service

Internal Revenue Service
1111 Constitution Ave NW, Washington, DC 20224

www.irs.gov | Privacy Policy

This is an official communication from the Internal Revenue Service. Do not reply to this message.
© 2026 Internal Revenue Service. All rights reserved.

Screenshot of the malicious website promoted by this spam campaign:

TiFlux installation confirmation screen (text in Portuguese, indicating the agent has been installed and is running in the background):

TiFlux ("Ti Service And Agent") as it appears in Windows Programs and Features after installation:

Screenshot of the installed TiFlux running in Task Manager as "TiAgent":

Instant automatic malware removal:

Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:

By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. 7 days free trial available. Combo Cleaner is owned and operated by RCS LT, the parent company of PCRisk.com.

Quick menu:

• What is IRS Tax Documents malspam campaign?
• Types of malicious emails.
• How to spot a malicious email?
• What to do if you fell for an email scam?

Types of malicious emails:

Phishing Emails

Most commonly, cybercriminals use deceptive emails to trick Internet users into giving away their sensitive private information, for example, login information for various online services, email accounts, or online banking information.

Such attacks are called phishing. In a phishing attack, cybercriminals usually send an email message with some popular service logo (for example, Microsoft, DHL, Amazon, Netflix), create urgency (wrong shipping address, expired password, etc.), and place a link which they hope their potential victims will click on.

After clicking the link presented in such email message, victims are redirected to a fake website that looks identical or extremely similar to the original one. Victims are then asked to enter their password, credit card details, or some other information that gets stolen by cybercriminals.

Emails with Malicious Attachments

Another popular attack vector is email spam with malicious attachments that infect users' computers with malware. Malicious attachments usually carry trojans that are capable of stealing passwords, banking information, and other sensitive information.

In such attacks, cybercriminals' main goal is to trick their potential victims into opening an infected email attachment. To achieve this goal, email messages usually talk about recently received invoices, faxes, or voice messages.

If a potential victim falls for the lure and opens the attachment, their computers get infected, and cybercriminals can collect a lot of sensitive information.

While it's a more complicated method to steal personal information (spam filters and antivirus programs usually detect such attempts), if successful, cybercriminals can get a much wider array of data and can collect information for a long period of time.

Sextortion Emails

This is a type of phishing. In this case, users receive an email claiming that a cybercriminal could access the webcam of the potential victim and has a video recording of one's masturbation.

To get rid of the video, victims are asked to pay a ransom (usually using Bitcoin or another cryptocurrency). Nevertheless, all of these claims are false - users who receive such emails should ignore and delete them.

How to spot a malicious email?

While cyber criminals try to make their lure emails look trustworthy, here are some things that you should look for when trying to spot a phishing email:

• Check the sender's ("from") email address: Hover your mouse over the "from" address and check if it's legitimate. For example, if you received an email from Microsoft, be sure to check if the email address is @microsoft.com and not something suspicious like @m1crosoft.com, @microsfot.com, @account-security-noreply.com, etc.
• Check for generic greetings: If the greeting in the email is "Dear user", "Dear @youremail.com", "Dear valued customer", this should raise suspiciousness. Most commonly, companies call you by your name. Lack of this information could signal a phishing attempt.
• Check the links in the email: Hover your mouse over the link presented in the email, if the link that appears seems suspicious, don't click it. For example, if you received an email from Microsoft and the link in the email shows that it will go to firebasestorage.googleapis.com/v0... you shouldn't trust it. It's best not to click any links in the emails but to visit the company website that sent you the email in the first place.
• Don't blindly trust email attachments: Most commonly, legitimate companies will ask you to log in to their website and to view any documents there; if you received an email with an attachment, it's a good idea to scan it with an antivirus application. Infected email attachments are a common attack vector used by cybercriminals.

To minimise the risk of opening phishing and malicious emails we recommend using Combo Cleaner Antivirus for Windows. 

Example of a spam email:

What to do if you fell for an email scam?

• If you clicked on a link in a phishing email and entered your password - be sure to change your password as soon as possible. Usually, cybercriminals collect stolen credentials and then sell them to other groups that use them for malicious purposes. If you change your password in a timely manner, there's a chance that criminals won't have enough time to do any damage.
• If you entered your credit card information - contact your bank as soon as possible and explain the situation. There's a good chance that you will need to cancel your compromised credit card and get a new one.
• If you see any signs of identity theft - you should immediately contact the Federal Trade Commission. This institution will collect information about your situation and create a personal recovery plan.
• If you opened a malicious attachment - your computer is probably infected, you should scan it with a reputable antivirus application. For this purpose, we recommend using  Combo Cleaner Antivirus for Windows.
• Help other Internet users - report phishing emails to Anti-Phishing Working Group, FBI’s Internet Crime Complaint Center, National Fraud Information Center and U.S. Department of Justice.

Frequently Asked Questions (FAQ)

Why did I receive this email?

This type of email is sent to large numbers of people at once - it is not targeted at any specific individual. The addresses used by the senders are typically collected through data breaches, purchased from third parties, or scraped from public sources online.

I have provided my personal information when tricked by this email, what should I do?

If you entered any account credentials on a page linked from this email, change the affected passwords immediately. Should you have disclosed financial details or other sensitive personal information, contact your bank or the appropriate authorities without delay.

I have downloaded and run a file promoted by this spam email, is my computer infected?

The file distributed through this campaign is an MSI installer. Running it installs TiFlux on the system, which gives the attackers remote access to the computer. If you have executed this file, the device should be treated as compromised and scanned with a reputable antivirus tool immediately.

I have read the email but did not click the link, is my computer infected?

No. Simply reading the email does not trigger any infection. Malware can only reach your computer if you follow the link and run the downloaded file. No action on your part means no risk.

Will Combo Cleaner remove malware infections that were present in email attachment?

Yes, Combo Cleaner is capable of detecting and removing most known malware, including remote access tools deployed without the user's consent. Running a full system scan is strongly advised, as some threats are designed to hide in less obvious locations on the system.