Malicious PDF — malware analysis report

Static analysis result for SHA-256 8291f30a7237b4c7…

MALICIOUS

PDF

83.6 KB Created: 2020-10-17 12:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c057d2f893e4377ab9b8ade3d22249a SHA-1: 272d8bc00be33ef4242c24f4d9a5f4371f0ba33f SHA-256: 8291f30a7237b4c7a9a070699a6e6249b1101b99b2d86886ef8cfd739ac38299
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://gettraff.ru/strik?keyword=tentativa+del+delito, is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that this file is designed to lead users to harmful 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://gettraff.ru/strik?keyword=tentativa+del+delito In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8a12f8b7dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f88b7d807ba6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f89128608b67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f897969b7015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f881f39134e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f89beb6f1637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f87666455b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f86f9d237dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f881b5920af3.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://uploads.strikinglycdn.com/files/14f87828-45aa-4204-b8b7-1707af35471a/36181037665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e418b9a-961b-4db1-95af-0ad975a1136b/pumisuwavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab45e325-9206-4486-926f-17f09a2a3d73/24632777177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fad241-9a96-4ff7-8f0e-b1d6725f6d4c/32021849189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3eb757-b1d2-4d3b-a12d-9b90c43cc5ac/37980442822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12499504-65d8-45e4-907e-40d436e3d37a/nunobikarep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a65ca66-76c5-4258-b07f-2a4f00f08272/24260040986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fa2ecf-b204-4c70-9c63-3f2d4a6c3517/fuboluwudebatedozukaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40742c7a-6f42-4253-b5c7-3857e049c5e0/68269748097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbdf6456-b6f5-455b-9568-bd30192820a6/64373930328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96accded-35e8-4144-a403-df0099d17564/sepagavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e006c22-6b77-4895-8605-b7b0bc7a4be1/tojegavebefetolila.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_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 4344 bytes
SHA-256: 318a981651f5fef3c4468a93bfcfdc34278ed1bff5cc1958a5a2a6e8d3147cd4
font_01_sfnt_off00010b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 11636 bytes
SHA-256: 5a890ded1ff5be2f0410798eda4c08c5c191b65e2d39e87eada9b48731ae8fb5
font_02_sfnt_off00013177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13177 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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