I would say this is nothing to do with your iPad. Is your iPad jailbroken? If so, have you installed anything unusual lately?
There is nothing I know of which is malevolent and in the wild at the moment which would do this.
Has the website in question been hacked? Have you tried the same link from a desktop?
Also, for the avoidance of doubt, please don't post the link here as if it is redirecting to p0rn we cannot allow that to be exposed (pardon the pun) here.