MacRumors is continually flashing up the message: Warning: Your Flash player plugin is outdated! Upgrade to continue! Safari is then redirected to: http://18.104.22.168/adobe_flashplayer_7.exe which is Non-authoritative answer: 22.214.171.124.in-addr.arpa name = b0.1c.adb8.ip4.static.sl-reverse.com. Maybe that's an adobe URL, but an .exe makes no sense. System Preferences for Flash (Yosemite 10.10.5) shows NPAPI Plug-in 126.96.36.199 and PPAPI Plug-in 188.8.131.52. I hit the "check now" and both show as being current. I also downloaded directly from the Adobe site. Not sure what "NPAPI" and "PPAPI are.