If you ever find yourself with the need to combine several PDFs into one single file, you may be immediately frustrated: It's not immediately obvious how to achieve what you're trying to do ...

Different formats can also make managing several documents cumbersome. Combining these documents into a single PDF file may be helpful for personal or professional use, to deliver simplified, ...

Updated: Google is preparing a patch for late April 2019. Some of the suspicious PDF files exploiting this bug don't appear to be malicious in nature.