Malicious PDF — malware analysis report

Static analysis result for SHA-256 2630778008ecb206…

MALICIOUS

PDF

49.5 KB Created: 2020-10-29 03:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 728dce3bc484e8e0c714d5b2b1f38b88 SHA-1: bfe1d31957c296055be1856e9f4ddbb5c9a94b37 SHA-256: 2630778008ecb2063c3898d5fb17368fd0646b0d3c53e92f51aa47e2dd1a0269
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ggtraff.ru/strik?keyword=dead+end+in+norvelt+pdf, which is flagged as malicious. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

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://ggtraff.ru/strik?keyword=dead+end+in+norvelt+pdf
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5f9391fca5eac.pdf
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5f9a09928ed49.pdf
    • https://mogawurid.weebly.com/uploads/1/3/4/0/134042680/wubanogapatobil_menugonizulaguz.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_5f90f359e7bb3.pdf
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/c72e7007faa1.pdf
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/bd2ef7.pdf
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f930f1ad8720.pdf
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5f8b89ab78aeb.pdf
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f9725e8bd23f.pdf
    • https://cdn-cms.f-static.net/uploads/4417645/normal_5f9727cd1d523.pdf
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5f90e51a83240.pdf
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8ff6fcc9ae0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0504/7219/0132/files/wisenet_nvr_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/773bbdad-e077-47ea-b250-c2e785aa9a65/wezigotipaxiboriwi.pdf
    • https://uploads.strikinglycdn.com/files/5844cc6f-b228-4e8f-9666-4c876c4d12aa/97229458470.pdf
    • https://uploads.strikinglycdn.com/files/5548e581-b62a-4548-a51f-73e19fe70b2d/6244567769.pdf
    • https://s3.amazonaws.com/fejififimaketo/the_art_of_war_summary.pdf
    • https://cdn.shopify.com/s/files/1/0428/7479/8247/files/correspondent_inference_theory_vs_covariation_theory.pdf
    • https://s3.amazonaws.com/wixanarer/lista_dei_phrasal_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/kitamupe.pdf
    • https://s3.amazonaws.com/nijudow/the_natural_speaker_randy_fujishin.pdf
    • https://uploads.strikinglycdn.com/files/1d460b9d-15bf-40f6-9211-730463efd560/tubowonab.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084df.bin
b35a124ea05c6fd1afb5a7174fd05a4a447c6a7b97c95624237b61828a745d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 4916 bytes
font_01_sfnt_off000095b4.bin
206039d1f08c3dbd18b8c6d6473a182a059325fdfa890cfff5d4b547f414603a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 10124 bytes

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