Yes, opening random pdfs especially in random and old pdf viewers is not a good idea.

If you must open a possibly infected pdf, then do it in browser, pdf.js is considered mostly safe, and updated.

Use the PDF to JPG online services, convenient and you still get your result without having to deal with any sandbox

Except of course that you're sharing the contents of that PDF with a random online service.

	▲	rvnx 14 hours ago \| parent [-]
		True, I just considered that once you handle a PDF with so much care like if it was poisoned, it's perhaps better to send this poison to someone else to handle.