Malicious PDF — malware analysis report

Static analysis result for SHA-256 467a3dc679ef6aa5…

MALICIOUS

PDF

44.0 KB Created: 2020-08-25 13:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1efdae87fbfeed60be954ddc6d8a94dc SHA-1: 92a410810607fda0c0cee8b3c88d6acc82541c21 SHA-256: 467a3dc679ef6aa5c5557a23b0304766552b0f886f32a802c648a1566dd65bd1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566 Phishing

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a URL designed to lure users into downloading a fake 'Google chrome installer'. The document body and embedded links further support this social engineering tactic, presenting itself as a browser update or installer. The presence of numerous embedded links, many hosted on Shopify, suggests a link farm used to obscure the malicious redirector.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=google+chrome+installer+free++for+pc
    • http://files.placentiatheatre.com/uploads/1/3/2/6/132682171/sezawisib.pdf
    • http://files.kristinachan.com/uploads/1/3/2/6/132696274/2082234.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/star_wars_action_figure_price_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/but_although_however_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/devise_sign_in_user_manually.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/mugezupaluvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/mizeratirot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/punelerutonuvukasiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/wurovexifawajidabariro.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/vubuguvoza.pdf
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/42575196639.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/low_key_suicideboys.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612b.bin
24b8dea69c31ffe25b687377e8278094746675d5e08b2e631699de54e249b77e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 5248 bytes
font_01_sfnt_off000072df.bin
8ce1cf72a0c1e632995fd01c7b70613f6029f0764c7396da93b4763ec4d4885b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 10084 bytes
font_02_sfnt_off0000955d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955D 4324 bytes

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