Dear Stefan,
Thank you very much for your help. I can't send you the document through here, but you can find similar documents in this link:
https://inpi.justica.gov.pt/en-gb/Industrial-Property-Bulletin
You can click in any of the links saying "Boletim da PI (date)". These are industrial property bulletins from the Portuguese patent office.
If your suspicions are correct, how can I overcome that? I know that I can just "print" the page I want into a pdf. But if I do it with pdf24 printer, gives an error. With microsoft print to pdf, for example, it looses quality and looses the hyperlinks the page may contain (which, in this case, are important).
thx!