Embedded fonts and size of PDF

Hi everyone,

I have a problem with embedded fonts on PDFs (reports). We send via email invoices and other kind of reports with embedded fonts. When the PDF file size is less than 3MB all works fine, but if the PDF file size is >= 3MB the fonts doesn`t display correctly.

The documents below are a packingSlip and an invoice, one works fine, the other not.

1MB file example (fonts OK):

3MB file example (fonts NOT OK):

If I see the properties of the documents, both has embedded fonts but for some reason, if the document is bigger than 3MB, fonts doesn't show.

Anyone know how can I solve it?

The version of AX is 2009.

Thanks.