Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbaa4a448a8aa1d…

MALICIOUS

PDF

70.2 KB Created: 2020-12-28 05:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 697af182d31c50839d3c1a72b83ee92f SHA-1: 3527c5a93c97232d760e31d1730df65f4990b426 SHA-256: bbbaa4a448a8aa1d094a4ae9f89d9fe87a33a403e846d7658858e373456cba6f
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'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=tectonic+plate+boundaries+map+worksheet In PDF document text
    • https://cdn.sqhk.co/bojojiweg/gczSieo/medajumotuwituka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fd5fb6c89a7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5fc0267393170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/julexekubaj/hydroforming_process_in_sheet_metal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece187c2-4779-4a81-ab28-bc9c323c4761/salida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01797b74-4530-4e89-9b92-83199b016206/2578358950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec85d030-9d3c-4229-ae03-e93f1b4fb1a3/nelson_calculus_and_vectors_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fc644c-ad6e-4c98-8cec-bfa764b75161/wezeveluvazebis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8720ea0b-5854-446c-b746-b27409a5b44e/how_to_make_a_water_breathing_potion_in_mc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba5b583-8960-496f-8c90-6f3b8e3c3155/89475276391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa83ff3e-d546-49c9-ba30-947ea71e264e/warppls_5.0_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC846 5440 bytes
SHA-256: f8a80788dbc504d60799fc8868210399eb48404e74d6256e969ade66ada8f8da
font_01_sfnt_off0000da8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8D 10276 bytes
SHA-256: 2c7b5afe7ac463ef3389a05fb731bdc9b07706d1df66ba8c6f8dee85adf8fe03
font_02_sfnt_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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