that link looks like the correct one.
if you got scribus from the official site, it's unlikely that it's the vector of your virus.
from that page you will be redirected to sourceforge, which is a somehow safe site for downloading software.
if on that page, you only clicked on the scribus download it should be safe.
but if you clicked on other links on that page (it probably contains ads), you might have downloaded programs that you did not intend to download.
but, then, you will have had to install them too...
if possible, in the future, if you're not really sure that this is what happened, try to avoid writing in public places that some specific software might contain viruses.
you are not providing any evidence that scribus downloads might be "contaminated" but you might scare other people.
in this specific case, the better choice would have been to just ask if the link you have is the official download link.