User-agent: Googlebot
Disallow: /images/
Disallow: /assets/
Disallow: /pdf/
Disallow: /pdfs/
Disallow: /*.pdf$
Disallow: /*.gif$
Disallow: /*.jpg$
Disallow: /*.doc$

User-agent: *
Disallow: /images/
Disallow: /assets/
Disallow: /template-images/
Disallow: /pdf/
Disallow: /pdfs/