It's possible it's a false positive because it analyzed the code and the only thing I see obfuscated in base64 is a .js function that doesn't look like malware
It's true that PrestaShop is open source, and code transparency is essential when it comes to trusting a module. While some obfuscation techniques can have legitimate uses (like protecting intellectual property), in an e-commerce environment, such practices are a red flag.
In the case of the livefilter.js file:
It uses eval, manipulates cookies, and sends external requests containing user data.
It contains base64-encoded strings and dynamic string reordering, making manual auditing harder.
It matches multiple behaviors described in the MITRE ATT&CK framework, which is commonly used to classify malicious activity.
Even if no direct payload was found during analysis, using this level of obfuscation is unnecessary in a trustworthy module. If there’s nothing to hide, why hide it?
For security reasons, it's strongly recommended to replace any module containing obfuscated code with open and auditable alternatives.