Personally I DL on a Linux machine and then upload to virus total. If they are clean, then I transfer them to an old android tablet without internet access for reading. If I was reading them on the machine I’d open them in a linux VM, either alpine or fedora silverblue with network aceess disabled.
The state of the art is qubes OS that has a tool to neuter a PDF by taking screenshots and building a new PDF in different VMs.
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Personally I DL on a Linux machine and then upload to virus total. If they are clean, then I transfer them to an old android tablet without internet access for reading. If I was reading them on the machine I’d open them in a linux VM, either alpine or fedora silverblue with network aceess disabled.
The state of the art is qubes OS that has a tool to neuter a PDF by taking screenshots and building a new PDF in different VMs.
There’s this program which supposedly will take a PDF and if it’s unsafe make it safe. https://dangerzone.rocks/
I’ve only heard of it today, so I have no idea about its efficacy.