Is an ad hominem fallacy applicable for when it refers to a news article?

Funnily enough, literally less than hour before I read your question I read this article in which the author says:

https://off-guardian.org/2022/09/10/dangerous-not-so-much/
"I have a very close friend who I used to feed some seriously damaging information (to the agenda). He never looked at any of it, he would respond with comments like, “The news source that published the article you sent me is known to promote Russia,” or, “The author of that article is a Republican, I didn’t bother to read it.”

Before considering anything, he looked over his shoulder to see what daddy or mommy had to say first. According to mommy and daddy we are all children to our handlers, we are all incapable of deciding for ourselves what is true or not true."

It simply amazes me how people will speak of a "credible source" when evidence is coming right at them that contradicts the so-called "credible source". I think the best approach is to canvass all sources of information and pick out the pieces that form a cohesive jigsaw from all the pieces. 

People will turn their nose up at Quora or Wikipedia or whatever source. You can get perfectly good information from just about any source - just not all the time or even much of the time - but it's a matter of vetting it and comparing it with other pieces of information not simply judging it by its source.

Also, when it's propaganda then sometimes it's a matter of decoding rather than dismissing it. I remember an interview with Gore Vidal where he said that he was surprised at how well Russians understood what was going on but they explained to him that you had read Pravda a certain way - go to a certain part of a page and then another part or something along those lines. No doubt he was being fanciful about the exact method but there are ways of telling and understanding the truth when you know how.

Dr Bo is right, but bear in mind you might be inferring too much. Simply pointing out a site is biased would be a factual statement (and it could be true/false - nothing to do with logic). If they say a claim is wrong because of its origin on a biased site, that's where you get a fallacy.

Trust me I am an expert :)