User-agent: Googlebot
Disallow: /*.gif$
Disallow: /*.jpg$
Disallow: /*.pdf$
Disallow: /*.zip$
Disallow: /*.ppt$
Disallow: /*.xls$
Disallow: /*.xlsx$
Disallow: /*.exe$
Disallow: /*.png$
Disallow: /*.hwp$
Disallow: /*.doc$

User-agent: Mediapartners-Google*
Disallow:

User-agent: *
Disallow:
~