Unable to select or search text in android app

Hi,

I have a pdf file and I can search and select text in it when I open it in my desktop. I'm also able to select and copy text when I open the file with other pdf visualizers apps in my android phone. But when I open the file with my mobile acrobat app, I just can't select text and, if I make a search, it returns no results. For the record, I'm able to select and search other similar pdf files with my mobile acrobat app.

If you need to analyse the file, it's attached.

Thanks.