Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d65431619fc8153…

MALICIOUS

PDF

44.5 KB Created: 2020-10-31 13:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ddba0e8839e6dc1d1a4701b7e444c7aa SHA-1: d79e41e9f523f25336aa3c1d820a45262a3164d5 SHA-256: 4d65431619fc8153028b93e98a47926b60248f3ace580117bc441dac50466fa1
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://gettraff.ru/aws?keyword=green+tea+estrogen+dominance', suggesting a lure to external malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=green+tea+estrogen+dominance In PDF document text
    • https://disanelazutiwi.weebly.com/uploads/1/3/4/3/134361230/simotekonaw_wezowivomorola.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/sefetufatovinujakomo.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/jimidenoguzofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_5f9a0cc91f088.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/76cc774d0a.pdfIn PDF document text
    • https://komimuvupelogi.weebly.com/uploads/1/3/4/3/134312664/vizig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f93f73025659.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5827/2691/files/xojevivekedabeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834a0221-eeb2-4f8b-83e1-554fa4195216/las_95_tesis_de_martin_lutero_en_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7257/8244/files/cambridge_first_certificate_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7107/3173/files/23375909209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0169964-6944-49bb-8b5f-d2021e2a42f6/xejipijekit.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_off000070e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 5256 bytes
SHA-256: 369206c5c02b4f240f46e319a129453c717bcdcb53f9abf20027d0b0cca94d61
font_01_sfnt_off000082ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AB 10208 bytes
SHA-256: d43d308676c231a708d2978ca967367a1de11345f8e8da059c80537e86e07c24

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