Search Engine Poisoning

searching for " fajita recipe" returns 2 malware campaigns.
from poisoned legit subdomains.

just some of the infected sites.
cooldenver.com/eytfo5/cdc.php?slow-cooker-cod-fish
vosar.biz/rifxa8/jj.php?bbq-pork-loin-slow-cooker-recipes
pscully.com/lab.php?ale=105
filipegouveia.com.br/t.php?mit=8
rbchelena.org/odi.php?psi=181
strengthenmefitness.com/qc.php?yet=87
thetechexec.com/beg.php?lm=242
neoapex.ro/bai.php?alb=255
nuveda.com/era.php?ps=185
http://magar.org/iycz4/yes.php?mexican-dishes-recipes
http://gathering.edfruinphotography.com/tnuii4/gtayk.php?caseroles-for-two-recipes
mchealthsolutions.com/vel.php?pya=168
esynectics.com/vin.php?ace=37

may only activate if the referrer is set to google.com