Watch Out For Malicious PDF Attachments

Malicious PDF

Malicious PDFs are another hacker’s favourite. Over the past few weeks, we’ve been looking at ways you can be vigilant in the fight against hackers. So far, we’ve looked at two-factor authentication, encryption, and avoiding public WiFi.

This time we’re going to look at PDFs attached to emails.

Why PDF attachments can be bad news

Hackers are sneaky by nature.

On the face of it, a PDF looks quite an innocuous document. After all, you open them every day during your regular working practices. However, there is a darker side to the humble PDF.

Its called steganography – derived from the Greek language meaning ‘covered writing’, where a data file or malicious code can be hidden within another file.

A PDF file is a perfect vessel for hackers because they’re generally thought to be safe. However, if you receive one that contains malicious code, opening it will drop the code on to your device in a similar manner to clicking on a malicious link on a website.

How to stay safe from malicious PDFs

They are challenging to catch and check. That’s why it’s best that whatever PDF reader you use, your anti-virus or endpoint protection is up to date and that your email servers are running current and updated filters.

Software is also available that can test the PDF file before allowing it through to the intended user.

Be vigilant. Stay safe.

MPM Computer Consultancy provides IT Services, Support and Training to sole traders and small businesses in Ipswich, Bury St Edmunds, and surrounding villages.