User-agent: *
Disallow: /*.pdf$
Disallow: /*.PDF$
Disallow: /*.doc$
Disallow: /*.DOC$
Disallow: /*.docx$
Disallow: /*.DOCX$
Disallow: /*.ppt$
Disallow: /*.PPT$
Disallow: /*.pptx$
Disallow: /*.PPTX$
Disallow: /*.xls$
Disallow: /*.XLS$
Disallow: /*.xlsx$
Disallow: /*.XLSX$
Disallow: /*.zip$
Disallow: /*.ZIP$
Disallow: *.pdf