Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Puppies Wallpapers – Cute Dog Backgrounds [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Google privacy policy used as policy — admits data collection & 3rd-party sharing, no scope to this extension.
• Uninstall URL hijack to chromewallpaper.com — classic traffic-monetization telemetry pattern.
• Install URL hijack to chromewallpaper.com — onInstalled redirects user to 3rd-party site.
• NewTab override + search permission: primary monetization attack surface for search/ad injection.

Evidence

• uninstall_url_hijack manifest chrome.runtime.setUninstallURL → https://chromewallpaper.com/uninstall; 3rd-party traffic capture on removal.
• install_url_hijack manifest onInstalled opens https://chromewallpaper.com/puppies-wallpapers-cute-dog-backgrounds; 3rd-party redirect.
• newtab_override manifest chrome_url_overrides.newtab = index.html — replaces every new tab page.
• privacy_policy_generic store Policy is Google account policy (scope_extension=false, data_collection=true, third_party_sharing=true). +10 Privacy.
• developer_identity store Free-webmail gmail dev, empty developer_name, no verified publisher, no featured badge.
• js_external_hosts crx 8 external hosts including chatgpt.com, instagram.com, netflix.com, youtube.com, x.com — broad reach for a wallpaper ext.
• webstore_signals_hijack store Both install+uninstall URL hijacks present: +3.0+2.0 webstore; monetization shell fingerprint.
• operator_cluster_siblings api sibling_count=0 by compound key, but uninstall_url and csp_host_set each have 1 sibling — shared infra.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Puppies Wallpapers – Cute Dog Backgrounds [adware] + malext.io malicious_extension_sentry; score 5.16 -> 7.66 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading/modifying search queries; paired with newtab override amplifies search-hijack risk.
• chrome_url_overrides.newtab medium Replaces every new tab; primary surface for ad/search monetization shells.

Pillar Scores

Bookkeeping