fonts not applied to high ASCII characters
As I suspected, the issue was NOT off-topic. It turns out that the downloaded fonts were not set for Unicode. Most likely, they were using the euc-kr character set. Since the site uses utf-8, the ranges for the characters in utf-8 are different from euc-kr, so the default font was being used to display.

I downloaded a different version that specifically listed the font as Unicode and now the characters display correctly for that font.