Malicious PDF — malware analysis report

Static analysis result for SHA-256 78361a36b296b880…

MALICIOUS

PDF

43.3 KB Created: 2020-10-30 22:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cf0dbc57230b02c9381d71f9ee5ef48b SHA-1: 989a732e785fa7e77a9e6cabb746bac0a4ccc22e SHA-256: 78361a36b296b8806cc36c5d0474584a58db18f565286f6b05b405b74c5c78ca
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'gettraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of a malicious URL indicates a likely phishing or malware distribution attempt.

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=northern+bank+direct+locations In PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/bafab_devapekixiwumi_zudapufuloz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5f9b83023b018.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/9623163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_5f8e770db4150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f90fa4f59066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5f956db103cb4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a36731-6a72-4f3a-a063-eea55d4fb7fb/nekobujomoxemego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8f6ea2e-09df-4bf8-893b-57af6d90ab44/sefesoma.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/download_materi_biologi_sma_kelas_x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23750162-dbdb-4b17-91bd-b1cda406820d/the_outsiders_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/18038642967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e14f646-eeee-4157-ad22-e95e04894533/guwutuvobumisevasap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0096d372-4f8e-4e3c-9c78-496a6b8b3351/ligoralurilatapawevogawor.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/joxugozurinotisupoxaro.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_off000068bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 5200 bytes
SHA-256: 8e2d857e79de9dab8e9f61084be1ee235e7a801de7cc4d117cffb00b5ba4e6ab
font_01_sfnt_off00007a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 11148 bytes
SHA-256: 1a691a80e1bd6cae282ceb4bfef2d05b1bd264945a63aff303fdb458798cc7f6

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