The company says it will provide more information as it becomes available.
Equifax Canada spokesman Tom Carroll says the company is aware of the situation identified on its USA parent company's website related to its "credit report assistance" link. On Wednesday, an independent security analyst found that part of the credit history site was under the control of hackers.
The firm said it took down the link for credit report assistance temporarily "out of an abundance of caution". "We are aware of the situation", a spokesman said.
The web page in question now displays an error message that tells visitors "the website is now down for maintenance". We are working diligently to better serve you, and apologize for any inconvenience this may cause.
Shares of Equifax were down about 1.7 percent at around 1:55 p.m. ET.
The Equifax may have been hacked again, now to serve up adware.
His first reaction was disbelief, he said in an interview with Reuters on Thursday. Then he successfully replicated the problem at least five times, making a video that he posted to YouTube.
Last month, Equifax announced that about 143 million people had seen their Social Security numbers and other sensitive information exposed when someone exploited a website application to access confidential files between May and July.
Anyone impacted by the breach is now at risk of identity theft and fraud - as any piece of this personal information can be used by, or sold to, criminals who can use it to open credit cards, take out loans, make purchases in your name - or even drain your bank accounts.