Malicious PDF — malware analysis report

Static analysis result for SHA-256 9284e5a6b40d11c1…

MALICIOUS

PDF

33.1 KB Created: 2020-08-17 16:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddf6f754b76d18eabcc55933d6fdbdc5 SHA-1: 10e47cc1be02f8c9a80719a1d5f7975ec18ebe6c SHA-256: 9284e5a6b40d11c1c25b4fc74cbab57b0efe591e3ebda41a49c82332c5ce5a8b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector service (ttraff.com), and another identified a large link farm, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The document body contains text related to 'Breakspear school ickenham uniform' and includes the malicious URL, indicating a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=breakspear+school+ickenham+uniform
    • http://files.moenacafe.com/uploads/1/3/0/8/130874422/jusomupajeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0435/9965/9176/files/kodebat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/energy_environment_and_climate_wolfson.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/business_key_success_factors.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/how_to_write_business_plan_for_startup.pdf
    • https://cdn.shopify.com/s/files/1/0440/2679/0053/files/candidiasis_esofagica_causas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/59606751005.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/lawesixozuganajeje.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/pdf_tool_split_pages.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/coldplay_yellow_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8096/files/auditoria_administrativa_gestion_estrategica_del_cambio_benjamin_franklin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/cyrano_de_bergerac_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/kufijikovefomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/jigapumogusokurunef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004689.bin
c6081f21b9be6ef68d6033d52dfb94a483e82eb85aedfb5b1a56d63c8250d723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4689 5368 bytes
font_01_sfnt_off0000589d.bin
b066d33eb8f7e07e78e840dbfe302b35dbd88840df2641e53d6982ded164475e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589D 9108 bytes

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