PDF toxic downloads need to be cautious

Recently, a new variant of malicious programs tried to hide itself as a PDF document. When the user clicks on the PDF shortcut, the malicious program is automatically activated, infecting the user's computer. Even more dangerous is that many third-party anti-virus software does not recognize the variant. In terms of communication methods, this variant of malicious programs is generally spread through E-mail attachments, which are generally in Zip compression archive format. Preview this Zip archive, which contains only one "PDF document" and several "shortcuts", but after decompression, this "PDF document" can not open the browse normally, the reason is very simple, it is itself An “exe” executable program. When the user finds that it is not possible to run this "PDF document" directly, it may subconsciously run other "shortcuts", and the result runs a shortcut. This malicious program automatically wakes up, undoes its own PDF document camouflage, and directly converts it into a An executable malicious program. When we look at these "shortcuts" attributes, it's not hard to find their purpose. These shortcuts may automatically disguise the malware and directly infect the user's computer system. At present, third-party anti-virus software does not directly identify this infected Zip archive. Therefore, ordinary users need to carefully download PDF documents or Zip archive attachments in E-mail.