How many times have you heard “Don’t open attachments”? It’s a solid advice, but 1. most people don’t follow this advice and 2. depending on your job ( i.e journalist ) most of the time it’s almost impossible to follow.
Dangerzone: Convert Potentially Dangerous PDFs, Office Documents and Images to a Safe PDF
A free and open source cross platform tool that allows you to convert potentially dangerous PDFs, Microsoft Office or LibreOffice documents, or images into safe PDFs