User-agent: * 
Disallow: /*.pdf$

User-agent: * 
Disallow: /*.doc$

User-agent: * 
Disallow: /*.xls$

User-agent: * 
Disallow: /*.txt$

User-agent: * 
Disallow: /vestibulares/

User-agent: * 
Disallow: /concursos/