Just an update on this infection. I contacted the webmaster of the site and he indeed was infected. Here's his response:
Hi ...
Thank you for this warning. My website was infected indeed. This is the second time now.
Can you please run a check now ? I believe the threat was removed.
Thanks
The site is now clean with no redirects or warnings from Avast.
Thank you Avast, you saved me on this one for sure.
All the best,
scjr