Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c95807ad3267725…

MALICIOUS

PDF

111.2 KB Created: 2020-12-19 10:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d9e06edd2f621436ed5d2a8728caa225 SHA-1: ddf26d10e7decb882bf74996e211d853936e2d73 SHA-256: 8c95807ad3267725a5abaa652edff1e1b8dd6e14da4a4eb966c7660da28931f0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL points to 'traffmen.ru', which is flagged as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it's likely part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=pbs+nova+hunting+the+elements+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_5faaea30f11c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5fbf2baa3773d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad08be50-c6a1-4b28-8a89-3afb354571e9/random_zip_code_in_new_hampshire.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/19189045669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed12005f-e41b-4589-a729-abc01e8a4e8f/teyber_interpersonal_process_in_therapy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe57b43c02f22b9ddbe045/1606309813009/fezaloxoxogowubizezaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4bab83-5b43-4019-9460-4b3be889077b/90965252874.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/buvap.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/jobavukazudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378300ad-8e4b-474d-9f3d-90d09b2bf6da/flight_simulator_2004.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c12b92c50b1a1e98b3c9/t/5fd6970313a48350e81ac39e/1607898884293/colours_tv_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bbb47d-6d80-48cf-9a41-7acd9d4a70e5/deep_learning_for_computer_vision_with_python_imagenet_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/revolutionary_war_map_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/android_studio_master_password.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001790c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1790C 5456 bytes
SHA-256: 893d11ab5da78de7163cae4f4816bf3fd4e63126abd3d4604d5b8856fd2e09ae
font_01_sfnt_off00018b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B82 10500 bytes
SHA-256: d34a2ebe566d575a3f7b855f6a6419cb5515a196135e6ddc85743cf7a2a744a9

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