Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c124e37d16823a8…

MALICIOUS

PDF

71.8 KB Created: 2020-12-25 16:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c67b06ac43bbefea488da6030e26fc66 SHA-1: 868c7f2d1a0d4552d8d07afa1277d37c8fa0692e SHA-256: 1c124e37d16823a87cd4a1af324303ce224acd831304cc4ae832bf3d3334a286
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The embedded URL is designed to lure users by referencing popular content, likely leading to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/strik?utm_term=youtube+big+bang+theory+full+episodes+season+11 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450139/normal_5fdf1f4449561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8975148253f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465919/normal_5fc4cacf680b3.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/Z0jiDyH/candy_crush_friends_saga_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f9817ccb03c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425484/normal_5f98847f8d2c3.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/mesotodimus/nevewigidoxomepelafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b67f903-c2b6-44da-98b1-c71da6bb0e5e/62298236561.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/yamaha_dtxpress_iii_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404f5bbe-0753-4be4-9f46-e0640bafcc65/lafayette_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/bukhari_shareef_free.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/62264165241.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/32584303248.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/vscode_formatter_prettier.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/76050049467.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/dakojob.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/equations_of_circles_worksheet_answers_with_work.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_off0000db96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 5560 bytes
SHA-256: bd714c7d60a94c74591ec5c60be563aa7e4d721fd1d2204cd110abac444c72d4
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 10252 bytes
SHA-256: bfbe002f2652bd15772cf15ac7f43f4c68d19a82408e87802854b502e8ac5cae

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