Odd character (Greek flag) in PDF output

[Jeff with a J]

So this is an odd one. On occasion my PDFs will have a Greek flag in place of certain letters in a particular font style (it's usually the 'y' in GT America Bold font) but it does seem to show up randomly (as in example below). 

I've searched multpile forums and Google of course - nothing. This happens to other writers on my team, as well.

[try67]

That's a new one... Most likely a corrupt font encoding. Could you share the actual file/page with us, please?

[Jeff with a J]

There's IP content in the entire file which I can't share - I'll extract the page and see if I can redact the sensitive parts.  

[Jeff with a J]

Here's the extracted page redacted.

[try67]

It seems to be in place of the hyphen symbol, possibly the one that's used to break a word across sentences.

I think it's a bug in the font you're using, "GT America". Did you contact the author of this font?

Also, the file doesn't contain any info about how it was created. Did you create it, or did you get it? If the former, how?

[Jeff with a J]

We create PDFs ourselves: in the example I provided, that is a PDF output from an XML-based authroing tool we use (Paligo). We have the same issue when converting Word to PDF (with Word conversions, it's almost always a bold lowercase 'y' in GT America Bold that casuses the issue). If it's corrupted font, how does one go about tracking that down?

[try67]

Try using a different font, first of all. If it solves the problem you should report it to the font foundry that created it, or just stop using it altogether. If it doesn't solve the problem (which I doubt) the issue is probably with the tool you're using (Paligo). Report it to them.