Newsfeed on all pages – Sites hacked?

Hello,

I am using the Sueva-Theme for my WordPress. I lately have the problem that there is a newsfeed embedded into my site. Between the Menubuttons and the content there is a strange newsfeed which I cannot delete.
The links do not work but bring me to non existent links like:
– https://www.weberfrau.de/generally-dodgers-cant-start-particular-flame__trashed/
– https://www.weberfrau.de/seattle-mariners-deals-definitely-nate-karns-absent-item__trashed/
– https://www.weberfrau.de/philadelphia-phillies-2012-age-mlb-5-activity-62__trashed/
Again, there is no virus attached because no other site is opening.

I was trying to delete those links from the pages / posts which was possible but they still appear on the Website.
I also checked the WordPress-Editor but I cannot find the links there as well.

Someone with similar problems or knowledge how to fix?

Thanks a lot