Your request contains some obscrure information:
- may you explain what ppi proformd is?
- how pdflib is used, which activity is applied to original document?
May you upload the expected rendering, please?
Try downloading this:
own.mobiles.it/index.php/s/j66elfC3Wf370GB
It contains the rendering from Acrobat Mobile, Acrobat Pro MacOS, MacOS Preview, PDFTron, RadaeePDF.
It seems:
- none of above rendering engine is showing fonts in the very same way
- the worse one is Acrobat Mobile which is completely missing the right font
May you specify, please?