TicketWeb has suffered a security breach which saw emails containing malicious links purporting to be from Adobe sent to its customers.

On February 11 customers of the British ticketing site reported receiving up to four emails all with the subject 'Action Required: Update Your PDF Application'. The email claimed that the recipient's version of Adobe Reader was out of date and offered a link where they could download the new version. However, the link in fact lead to a malicious site that would have infected a PC had it been clicked.

"We have discovered that our TicketWeb UK direct email marketing system was exposed to unauthorised access," TicketWeb explained, indicating that hackers has obtained the email addresses and subsequently sent out the emails containing malicious links.

TicketWeb advised its customers not to click on the link and simply delete the email.

"We have taken immediate action to close the vulnerability. You can rest assured that none of your credit card information was vulnerable during this attack," the firm said.

"We sincerely regret any inconvenience this has caused. We are continuing to investigate this unauthorised access, and will send you a follow-up email when we have additional information."