[OS X TeX] pdf illustration

[George Gratzer]

Attached, the pdf file cover.pdf, note the lowercase German p and q.
Attached, the tex file, example.tex, which reads:

\documentclass{amsart}
\usepackage{graphicx}
\begin{document}
\title{Example}
\maketitle
\begin{figure}[htb]
\centerline{\includegraphics{cover}}
\caption{yy}
\label{F:cover}
%Figure~\ref{F:cover}
\end{figure}
\end{document}

When I typeset, the German characters are missing from the illustration.

Wow. How?

GG
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20230316/a357f8ca/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cover.pdf
Type: application/octet-stream
Size: 14848 bytes
Desc: not available
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20230316/a357f8ca/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: example.tex
Type: application/octet-stream
Size: 233 bytes
Desc: not available
URL: <https://email.esm.psu.edu/pipermail/macosx-tex/attachments/20230316/a357f8ca/attachment-0001.obj>