As an FYI, we have experienced almost zero malware issues with our very robust PDF-rich, professional design and drawing production-centric environment.
We use Bluebeam a lot. For the price, it's a great deal, and the company is a great company, with happy and productive employees.
In contrast, we find Autodesk products to be overpriced and under-supported, with a variety of unannounced, confusing and time-wasting changes to software offerings. The normally billable time that was wasted trying to get rid of the latest spurious Autodesk Design Review/Trueview prompt could have bought another Bluebeam seat.
I found out not on the Autodesk web site but in a happenstance forum thread that Design Review appears to have been discontinued.
Because Autodesk has a de facto monopoly on the commercial building design and construction industries, we are forced to use Autocad every day.
We use Bluebeam because it works and is reliably supported.
Hope this helps.