Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91d65eaaf9e32d5…

MALICIOUS

PDF

44.6 KB Created: 2020-10-28 04:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87ca9e371db47953c24c1c181ab3af18 SHA-1: d7aee86c71be7e6583c0ec723d1efd6bc05e1970 SHA-256: c91d65eaaf9e32d507970a2070f0351a86aa8b9d7012255d39cd8ed448bb1e1b
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://ggtraff.ru/strik?keyword=the+absolutely+true+diary+of+a+part-time+indian+summary+chapter+4', is the primary indicator of malicious intent. This suggests the document is designed to lure users to a potentially harmful site, likely for phishing or to download further malicious content.

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://ggtraff.ru/strik?keyword=the+absolutely+true+diary+of+a+part-time+indian+summary+chapter+4
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5f9327e439c12.pdf
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f8da97985b25.pdf
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f879d02d4917.pdf
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f98a22ea86a9.pdf
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8fbaa184310.pdf
    • https://cdn-cms.f-static.net/uploads/4425929/normal_5f98a603c91da.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8c144bd6bdd.pdf
    • https://cdn-cms.f-static.net/uploads/4415300/normal_5f958a104bd6d.pdf
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f884a0d287d1.pdf
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f8b5b4eade87.pdf
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f8b534ea0dbe.pdf
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5f923f34eee1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wilugugo/kibuviwiwotigujo.pdf
    • https://s3.amazonaws.com/leguvefu/moroxodutebegulave.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/30217641129.pdf
    • https://uploads.strikinglycdn.com/files/d0688499-4cdc-46c3-a9ce-d53025658741/rekitiroburimigarudodi.pdf
    • https://uploads.strikinglycdn.com/files/d80b4213-0617-49d1-9fc1-82d8643372b0/dibujos_para_colorear_de_disney_online.pdf
    • https://uploads.strikinglycdn.com/files/6c605f71-604a-4f7b-b892-dc0bd213d743/wefoleru.pdf
    • https://uploads.strikinglycdn.com/files/ea6a68ec-669e-413d-b4e2-e8f97cf27f7e/kite_runner_kite_project.pdf
    • https://uploads.strikinglycdn.com/files/97e8c1b4-be03-40e4-9e7d-3422dd466005/wiriwotuzi.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_off00006e2e.bin
7944b014a0f61646f77f2f4ef1da671feb54c6450866ffbd843f5120a3d7d7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5708 bytes
font_01_sfnt_off0000817b.bin
2a875ac28b7f4ab472cf0ba9aee1ba3fd5ee451b19d12b7b922b64e053bf1d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 10160 bytes

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