The Spammers are getting clever. They’re now inserting their spam messages in PDF files and sending them as attachments to by pass spam filters. Since the emails themselves say little or nothing the hope is the recipients will be curious and open the PDF attachment as they’re considered to be a safe file by many.
While PDF files are relatively safe, they’re not always. Especially if your PDF reader isn’t up to date!
The most prevalent usage of PDF spam is for pump-and-dump stock spam campaigns. By the way, how does anyone still fall for these?
[tags]block spam, email, stock, stocks[/tags]