User-Agent: *
Disallow: /media
Disallow: /*.pdf
Disallow: /*.xls
Disallow: /*.xlsx
Disallow: /*.ppt
Disallow: /*.pptx
Disallow: /*.doc
Disallow: /*.docx
Disallow: /*.txt
Disallow: /admin

User-agent: Yandex
Disallow: /media
Disallow: /admin
Crawl-delay: 3

User-agent: Googlebot
Disallow: /media
Disallow: /admin
Crawl-delay: 3