See https://outreach.wikimedia.org/wiki/File:Welcome2WP_Hung.pdf .
The preview image is in a very lighter color, and it doesn't render the Hungarian sentence correctly. It should read "Képzeld el azt a világot, ahol mindenki szabadon hozzáfér az emberi tudás összességéhez!" instead.
Version: wmf-deployment
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=70734
CC Bence, IIRC he had some discussion with the developers about this issue back when he created the booklet.
Weird, on my phone it renders incorrectly, than switches to high dpi version which looks correct.
Purging seemed to fix issue. Guess our pdf renderer has been subsequently fixed. Can you check that it looks correct for you now?
Interestingly, the first page looks correct in the small navigational thumbnail.
For the second page it's the inverse, it looks correct in the large preview thumbnail but completely broken (wrong color and font size) in the small one.