I'm having issues where watermarking is interfering with extracting tables from some documents. I made an example document that fails to detect the existance of a table (see attached). I have other documents that I'm trying to extract data from that where the watermark is interfering with the extract API. Unfortunetly, I can't share those documents. Hopefully the example document is illustrative enough.
No luck probably on having PDF Extract API to ignore the watermark.
It looks like the watermark in your PDF isn't a properly generated watermark because otherwise I would typically suggest that you go into Acrobat and select "Remove Watermark", but that doesn't work because it isn't written into the file like a watermark should, just as an object.
You can remove the watermark manually in Adobe Acrobat DC by clicking on Edit PDF and selecting each of the characters and deleting them.