Thanks guys for responses.
@Chris
We do send out a fair share of PRs (we are a B2B software/platform provider) but considering the amount of spammy brand mentions I see lately on completely unrelated pages and based on assumption (https://mza.bundledseo.com/blog/panda-patent-brand-mentions) that Google (now or in the future) may consider this kind of brand mention as a ranking factor ... so yeah, I'm more concerned about long term negative impact that this proportion could have on our rankings.
@EGOL
The link I showed was a random pick from a long list of unrelated pages mentioning our brand name that started to show up lately. Is not about stealing our content or anything like that ... just random pages. Today can be a page talking about icons, tomorrow other subject ... the domains look random as well.