Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c183734745f146…

MALICIOUS

PDF

34.4 KB Created: 2020-11-01 07:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3e5165000c8d9354c1a5d2076f568957 SHA-1: 7bd3197545932418db7f58ed8a12d2aff8f76ffc SHA-256: b4c183734745f1461f11e04f50be6fef9915a4d7a5a3285444ae863596059d6b
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a link to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/aws?keyword=9mm+dummy+rounds+glock` is the primary indicator of malicious intent, likely serving as a lure for a phishing or scam operation. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/aws?keyword=9mm+dummy+rounds+glock In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8d4b062efa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/60685746300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50412bdd-3925-47c4-927d-1b5a715772dd/jatosevebisinodunukeduga.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/lesson_2-5_algebraic_proof_practice_b_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ffee7f-1545-4253-b4e4-cbd6c90c8d6c/subedolofefep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d938725-346c-4774-b29a-e1ca53b80244/bejedijilubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86549f1d-302c-4cd7-b849-e003270761cf/good_housekeeping_illustrated_cookbook_cream_puffs.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/iata_airline_cabin_crew_training_course_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc3d2fd-d8c2-426a-971a-7a0ef2adc63d/dnyadaki_toprak_tipleri_ve_zellikl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e621f7e0-26df-4424-b0d3-632dadd43f59/ropofazuritebumuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ceac97e-0408-414e-8d88-1d7d13b36fd8/4627668162.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_off00004834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4834 5276 bytes
SHA-256: 0f0558d83cd9769e065cbec842a43ff1251b36537c200fd5e618cda5ef513cfd
font_01_sfnt_off00005a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1B 10464 bytes
SHA-256: fd689b289d734fcc71979fef1ee03a9195cc92eb8901fd6def29ef6a344e9c71

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