I do not know if the symbol font is the Adobe Reader font. Is see a SYMBOL.TTF (OpenType, Digitally Signed, TrueTypee Outlines) file and a SYMBOL.FON file in the folder C:\WINDOWS\Fonts
If have installed the he following fonts for Adobe:
AGaramond; Myriad; AJenson and Trajan
Chinese Simplified, Chinese Traditional, Japanese and Korean
Extended Language Font Pack : This Font Pack covers Hebrew, Arabic, Thai, Vietnamese as well as the Eastern and Central European languages (including Cyrillic and Greek scripts).
The result is the same. The symbol isn't displayed correctly.