The npm package 'gunzip-js' version 99.9.1 is a malicious typosquatting package that pulls attacker-controlled code from an unaudited external source. It declares a dependency as an HTTPS tarball URL hosted on an anonymous Google Cloud Storage bucket, which is not associated with any known publisher. Installing this package results in downloading and executing potentially malicious code from this external source. The package itself is near-empty and serves only to facilitate this unauthorized code execution.