Environment

• Confluence 6.1.4
• Confluence 6.2.0
• Confluence 5.10.8 can render the characters

Steps to Reproduce

1. Attach the sample pdf file to a page. (testpdf.pdf attached)
   
2. Save the page.
3. thumbnail looks good.
   
4. Preview/download the pdf file. no characters.
   

Expected Results

Characters are rendered normally.

Actual Results

All characters are not rendered in PDF preview/download.

Workaround

cd /opt/atlassian/confluence/confluence/WEB-INF/atlassian-bundled-plugins
jar -xf confluence-previews-11.3.15.jar mediaviewer/lib/mediaviewer-2.js
sed -i -e 's/c.cMapUrl="/c.cMapUrl=e.basePath+"/' mediaviewer/lib/mediaviewer-2.js
jar uf confluence-previews-11.3.15.jar mediaviewer/lib/mediaviewer-2.js

rm -rf /var/atlassian/application-data/confluence/plugins-osgi-cache/