https://blog.faceutil.com/2020/03/27/%ec%95%84%ed%81%ac%eb%a1%9c%eb%b2%b3-or-%ec%96%b4%eb%8f%84%eb%b9%84-%eb%a6%ac%eb%8d%94-%ec%82%ad%ec%a0%9c-%ed%88%b4-adobe-reader-and-acrobat-cleaner-tool-%e3%8e%99/