The solution for me was to remove the 'Alien League Tech' font. YMMV.
]]>I've been having an issue recently where certain PDFs render unreadably "squished" fonts when opened in chrome or chromium. Here you can see the PDF in gnome's pdf viewer, and here you can see what it looks like in chromium. This also happens if I view it with no extensions/in incognito.
I wouldn't be surprised if I incorrectly set up some fonts, but I wouldn't know where to look.
]]>