https://blog.faceutil.com/2017/05/05/pdf-%eb%b7%b0%ec%96%b4-adobe-reader-%ec%95%84%ed%81%ac%eb%a1%9c%eb%b2%b3-%eb%a6%ac%eb%8d%94-11-0-12-portable-%eb%ac%b4%ec%84%a4%ec%b9%98-%e3%82%85/