If just one result gives a suspicious result, we declare the site as "may not be safe".
There are other website that specifically deal with downloadable files. If all the results are "safe" we assess the safe as "safe to visit".
When determining how safe a website is, it's important to consider the context of the link in question.
If the link was in an email, do you know the sender?
, even when all the results are listed as safe, do not assume automatically the site is safe to visit.
Also, look at the date of the last scan to determine how effective these results are.