I'm not sure if that's a virus, but it's definitely spam I'm familiar with from other sites.
Acknowledged.Whoever is doing this, should stop doing it, it's basically spam.
He should rather provide the admins with the information when/where this add appeared, so that they can investigate how it got there and how to get rid of it.
And you should only ever update the flash player from the official adobe website, everything else is malware.