Hacks happen.
Not so long ago, I searched Google for Fiji, and the official Fiji government site description said, “Buy Viagra on-line! Cheapest prices!” Since I don’t think the government of Fiji is selling Viagra, I put in a report to Google about it. It was fixed within a minute, and the Fiji government site now says “Official Fiji Government website...”
Often times that is due to a re-direct within your own system or router. Wouldn’t know for sure that the site was compromised except to go in through a completely different route. The rapid correction makes it more likely the problem was on your machine, since actual changes take time to install and/or propagate. It would have been interesting to know the actual IP you were accessing before and after the fix.