Most people already know the basic checks before opening a file. They also apply to PDFs: verifying the sender looks legitimate, exercising caution before opening or downloading unexpected attachments ...

I deleted Adobe Acrobat, freed up gigabytes of space, and haven't missed it once.

When somebody sends you a document as an attachment, don't just open it. Use the free tool Dangerzone to scrub it clean of any malevolent code. Here's how it works. You probably already know it's ...