I came across this guide (dated 2025) a couple years ago and thought it was interesting. Not a quant or even in finance though, so I don’t know how accurate it is:
https://www.dropbox.com/scl/fi/da7zfjj2rplwzf2sfiriz/Buy-Sid...
What's a convenient and safe way to open PDFs safely?
Some options seem to be: Upload to google drive (inconvenient), use some open-source tool (LLM suggests DangerZone), use a VM (very inconvenient)
Gappy is one of the more decorated, public figures in the space. That PDF gives a candid overview of what it's like to interview/work in the industry.