Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3d1cc180db24cd…

MALICIOUS

PDF

83.0 KB Created: 2020-12-01 08:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: df178ef944f2ca588e4255a0166dcb5b SHA-1: 1a2681af5c02d73ecef7ac501611c78d6144c1fd SHA-256: 7f3d1cc180db24cd1aa4f7599cd449979daafbbd9eeb567db9e0029e41f76ecb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=how%2527+s+it+going+yahoo+answers'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=how%2527+s+it+going+yahoo+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fb5c6b526586.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e800a879396864085b93/t/5fc370914f983757204bbf06/1606643859349/chie_mihara_shoes_australia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eda3ec917750a3d80aaa/t/5fc19035f81c9a2a0cdd26b6/1606520886184/honda_2000i_generator_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551ea74c-92ac-48f1-8810-fe21035bd28e/tepofujoxigijodokus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2e793f44f419c129bf93/1606233727404/punishment_for_violating_restraining_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c86c7c4a-30c4-4f16-b7a2-23a7a659224e/zipiwigivibufeki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a08bc819f1cf4d0eec5/1606380043099/puwinixorabubipiludafidag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a0327a199023ab7046e/t/5fc5579dbc819f1cf48a7110/1606768541421/kajakapezemivofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66375465-f98e-4e48-9d7a-1cf9d03f660e/72596204229.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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 3872 bytes
SHA-256: ecb816a2019a85e5533279c05b4aafbbe01f94cf5b0bfd601e0deb3ccb2ae645
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 5104 bytes
SHA-256: 2a72dca6a1cc5c33365af3f697b819142366f1aa0381d55c0076bf05696a4d48
font_02_sfnt_off0001178a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 11180 bytes
SHA-256: a2acb537698f86306dd5a37ab30c72aa6edbab00c05c50d1da3e5baf0dd9e661

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