I just did an internet search -- there is a repeat of last week's malvertising attacks going on, which is what is setting off all the page redirection. It is google ads that are getting taken over. I am going to post two links (if this doesn't get hijacked while I'm doing it), but one way to stop it is supposedly to turn off flash player. I haven't tried it yet.
Meanwhile, it looks as though the redirection could be spreading viruses through the malvertising, but again, I don't know enough about this to say. Apparently the stuff last week was limited -- the viruses only got through to folks running older software.
Here's the links, there's more information in there.
http://gizmodo.com/turn-off-flash-to-avoid-malvertising-attacks-1640832181
https://blog.malwarebytes.org/malve...rk-abused-once-again-in-malvertising-attacks/