iPhone Twitter app links redirecting to questionable sites
I hope someone knowledgeable can help me. The problem is this: Any link on my twitterfeed, when clicked from within the iPhone Twitter App, is redirecting to p**n sites via 4-5 redirection steps starting with something called gearse dot com. This is happening with ANY link on the timelines of any user I follow, including news sites, technology sites and so forth.
If I open Twitter via twitter dot com on a browser (iOS Safari or Chrome), this problem is not occurring, and I can open links just as usual. But the same links, when tapped (to click) within the Twitter app, redirects to these questionable sites. I have absolutely no clue how this happened. It is possibly the work of some malware, but I thought malwares didn't run on iOS, and I don't use my phone ever to visit any questionable sites.
So far, I have uninstalled and re-installed the Twitter App, to no avail. From the website, I revoked the access of iOS apps, which forced me to relogin to Twitter in order to use it, but that didn't help either.
Can someone please suggest what I can do in this situation? I know one option is to reset to factory settings and then reload everything from the most recent backup, but I want to avoid that extreme step if I can avoid it. Please help if you can!
Thanks.
iPhone 5s, iOS 7.0.2