Hi all,
I'm from France and just got the same problem when i woke up 1h ago ....
You are not alone, there is another forum with many peoples talking about it ! All starting TODAY
(http://forums.imore.com/ask-question/368973-ads-malware-mega-viral-content-site. html)
All the answers before are not usefull at all and don't fix it, clearing history, restarting, what ever, nothing fix it...
It's definitively a Massive attack against Iphone in all the world, as soon as you re-open safari and after consulting one of your page it reappears and jump you to that site [ m e g a . v i r a l - c o n t e n t . s i t e ]
So far i found nothing to fix it (exception and such a think is not a fix since you will always be redirected to a new page..)
Hope Apple is working hard on it already ....
Been using Iphones since they are born, never seen such an attack on it, like a lot of peoples i installed PoGo and navigated on 3 sites associate who are:
https://pokevision.com/
http://pokemongo.gamepress.gg/pokemon-list
https://go.jooas.com/
Really strange that all that happen right after the release of PoGo in France who started the 24/07/2016 .....
But really we don't know, we just have to wait and hope it's not the beginning of a new form of attacks...
Before some of you start to whine, i have an Iphone 6 plus that i bought new, i never install crap applications or what ever, never jailbreaked or anything, and as a man who work with computers all day, i take really care of the security on my precious, so all is blocked, every single options........... Can't be a more secure Iphone ... So definitively not a bad move from customer installing a crap ...
Good Luck