identifying vector for bytefence/chromium malware

I’m visiting my dad and he wanted to try some photo editing software for Windows. After installing (GIMP, XNview, Fotor, PhotoFiltre 7, Paint.net), the stupid bytefence/chromium malware popped up. I figure I clicked too quickly through the installer and installed it. I was able to clean the machine, but I’d like to know which one of these programs bundled stupid malware with their installer. Of course, it’s possible it’s none of them–I also visited https://pixlr.com/editor/, which has a suspicious flash page.

Anyway. I’m curious if there is anyway to check the installer files (or if anyone is familiar with that pixlr site). I don’t have any way to run a virtual machine right now. Scans don’t seem to pick anything up.

Anyway. I'm curious if there is anyway to check the installer files
Yes there is, www.virustotal.com / www.metadefender.com / www.jotti.org

Thanks. Turns out it was Fotor.