1. A method for determining a mobile application download attribution, comprising: identifying, by a proxy server, an application download from an application repository to a mobile device, the proxy server configured to receive unencrypted traffic flows between the mobile device and the application repository and to identify the application download in a file sent from the application repository to the mobile device; analyzing, by the proxy server, previously logged requests sent from the mobile device to identify a most recent request directed to the application repository from the mobile device; analyzing, by the proxy server, the identified most recent request directed to the application repository to detect a source of the identified most recent request and at least one identifier of the application, the source comprising one of a web advertisement, a landing webpage, or a search query; determining, by the proxy server, the download attribution respective of the source that causes the application download, the download attribution determined according to whether the application download occurred in response to the identified most recent request directed to the application repository from the detected source; and generating, by the proxy server, an application metadata respective of the download attribution and the application identifiers.