python binascii hex转str
010editor发现是个pdf文件
改后缀名为.pdf,因为pdf无法编辑,改为word
提示说flag在图片后面,使用Acrobat DC移开图片之后有一串十六进制字符:
77637466323032307b746831735f31735f405f7064665f616e645f7930755f63616e5f7573655f70686f7430736830707d
import binascii
In [2]: binascii.unhexlify('77637466323032307b746831735f31735f405f7064665f616e645f7930755f63616e5f7573655f70686f7430736830707d')
Out[2]: b'wctf2020{th1s_1s_@_pdf_and_y0u_can_use_phot0sh0p}'