Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd402574aee4deb…

MALICIOUS

PDF

71.1 KB Created: 2020-12-03 23:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d12106b8ceee3a7e6ec06beb5fd387 SHA-1: d914dfd2dae7f07ae98ede38b684abd3bd89c277 SHA-256: ecd402574aee4debceb8570c64b0192053bc4f18a6902cc775359f78a0cb9a71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=cute+january+2020+calendar
    • https://cdn-cms.f-static.net/uploads/4446925/normal_5fada298c2215.pdf
    • https://static.s123-cdn-static.com/uploads/4407057/normal_5fc7d5c65c89c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5489c403f5353fdb28927/t/5fc68fa05147b1480417ddbf/1606848417880/build_a_bridge_and_get_over_it_quotes.pdf
    • https://uploads.strikinglycdn.com/files/6165de6f-5973-449e-832f-210f24fc4b43/trig_substitution_calculator.pdf
    • https://uploads.strikinglycdn.com/files/422d069e-07cf-47d6-a5bf-fe7a6dfc7f0f/21916918869.pdf
    • https://uploads.strikinglycdn.com/files/051dee84-9a1c-40b9-a624-bfc77bd72c47/pain_and_gain_full_movie_download.pdf
    • https://uploads.strikinglycdn.com/files/cff0c2ca-f383-4bbc-9478-cffb3b9d22c7/zigumi.pdf
    • https://static1.squarespace.com/static/5fbfd2c30b6b03258f2f7c3b/t/5fc41bb32dd96f59186ecdb8/1606687668160/22re_timing_chain_guide_torque_specs.pdf
    • https://uploads.strikinglycdn.com/files/646db519-dc92-484e-805c-fb1f5e0abfed/lovubiteguwikepo.pdf
    • https://uploads.strikinglycdn.com/files/3458251d-af6e-45a0-8192-c9fe88efe87d/conan_exiles_khlkiste.pdf
    • https://uploads.strikinglycdn.com/files/74ff9308-a4c6-4f66-9a39-0d9985ba36c0/lefegibali.pdf
    • https://static1.squarespace.com/static/5fc1b82e11f6a419848b6c75/t/5fc3458408845d0924f33679/1606632837801/mrs_potato_head_lyrics_ukulele_chords.pdf
    • https://uploads.strikinglycdn.com/files/e2146960-b167-4241-8910-f51180493e8c/mid_atlantic_states_list.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1603f81c9a2a0c6a55ae/1606292995878/vokopujibakodidedujewu.pdf
    • https://uploads.strikinglycdn.com/files/54634338-3baf-454d-b482-f3f504b01913/weboxoli.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c763.bin
3b6b15cc3b3403337b1624a0903efba12f0336cd169064bc6fa885bf21c0d387		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC763 5112 bytes
font_01_sfnt_off0000d8d9.bin
d64b9663e158ece7cc3f1c9b7403ae0a0937fc465d2b2718f47668217e9d4ad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 9716 bytes
font_02_sfnt_off0000fa36.bin
a5f8211eb19bb545866f358c82bba5a2c184ea283cff53a421765d467b9ca8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 16212 bytes

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