It seems that there are no text, but you can copy and paste it anywhere (in kate for example) and the text is there. Evince displays it right but qpdfview has same issue, so I think it's related to poppler backend.
- Bug#887793: okular: Does not display text (the text is ther... Iago
- Bug#887793: Here is an example of pdf file (and its so... Yago Fernandez
- Bug#887793: More info Yago Fernandez
- Bug#887793: Another example file HD
