The BBC has established that posts from this one network - designed to erode confidence in the ruling government - have been seen over 20 million times on social media.
Moldovan authorities say millions in Russian cash has flooded into the country with the aim of convincing citizens to vote out the current pro-EU government. Russia denies it is interfering with Moldova's electoral process.
You can watch the full BBC Eye documentary "Rigged: Undercover in a fake news network" on BBC World Service YouTube or on BBC iPlayer in the UK.
