So I have entered a part of this string into Google just to find that there are 15k+ webpages containing the same code.
By clicking on any result link I've found rogue websites providing cracks, key generators and other funny stuff that would make happy (and actually does) a lot of people.
It seems to me that the code has been inoculated in those web sites with that fancy transitional home page that after a few seconds changes to the real home page.
The website I was checking is not listed as it prevents Google from crawling into it, so I presume the problem can be larger than seen on Google.
I'm posting this on Slashdot as I presume that a lot of people with the same job as mine is reading these webpages quite often and my proposition is to rise this warning to as many security advisors as possible.