Is this just me being paranoid about downloading? (details inside)

I posted a want ad on Craigslist looking for an 8mm projector (I found some old home family movies from 1964).
Someone replied, sending some pics with their response to my phone saying if this met my requirements I could have it.

These pics were on Winpix and I could not view them on my phone, it says “Flash image type not supported. Try viewing this page from a desktop or laptop computer.”

If I try it on a computer it tells me that “Adobe flash update for 34.0 is required” and gives an install button.

I am reluctant to push the install button.

I have looked up the update online and could download it from a different sites but it also appears there are possible problems with it.

Any suggestions?

Am I just being overly paranoid?