PDF-file contains black rectangles

Hello
I use PDFViewer3.3.8 in a project.
Some PDF-files contains black rectangles. I attached files to topic and created ticket www.radaeepdf.com/my-profile/my-tickets?...out=view&ticketid=51 .
In Adobe Reader these files are shown properly.
Thanks,
Darya

After checking your files, seems no issues about charset decoding.
Black box are defined in type3 font with code 0x20 (blank char).
We could filter them and act without any glyph rendering.
This behavior is decided on our own and is not defined in PDF reference.

Soon we will publish a new release introducing it.