Font problem

I'm sorry I shows korean that you may not understand. 

My problem is that the actual font displayed is different than the designated font even though I have the designated font in my local PC. 

The replaced font is very hard to read. I would like to designate a font to replace if there is no way to fix this problem. Please help me.

This is the screen of font - document property of a PDF.

This is my local PC files.