Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d4a3d68b8ebd37…

MALICIOUS

PDF

56.4 KB Created: 2020-09-30 13:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bec08f57c3c643146490a86f8b462319 SHA-1: 0e77ede626a2f5d8d06d814daffa1e28a655b88b SHA-256: 44d4a3d68b8ebd377a36222e0ec806f5504acce73004c1829056e83d131669ad
124 Risk Score

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/strik?keyword=arithmetico+geometric+series+pdf In PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/31951945078.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/niwexesixixefo.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/68345872881.pdfIn PDF document text
    • http://files.urbandaleartgallery.com/uploads/1/3/1/4/131437131/wutodife-jebumafawazose.pdfIn PDF document text
    • http://files.incredibleweatheradventures.com/uploads/1/3/2/6/132681545/286f6ed.pdfIn PDF document text
    • http://tevuwo.essenceofpishon.com/uploads/1/3/1/4/131438177/3530982.pdfIn PDF document text
    • http://files.halfordsisters.org/uploads/1/3/0/7/130776444/fuxizi-wojew-ritami-venivevadi.pdfIn PDF document text
    • http://files.buddycushmanfineart.com/uploads/1/3/0/9/130969097/dagoxujovos.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/baviz.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/guler.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/84664438454.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/10973007481.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/54893042259.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/59152216-bd4d-4830-9bde-ee3869c61fac/53588146211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0b3add-11ef-4b84-9182-8c5afc7c1eaf/43595331668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2b2899-37cf-432c-9bf8-6009339e00c0/60917092287.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC7 5316 bytes
SHA-256: e17e3f4c4c2f80d6ba2c717f23c7f79b664cc8ba882ae56dba012c309019c2dc
font_01_sfnt_off00008ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC0 15528 bytes
SHA-256: 19f1575c192ffeb3b04555322e843189539eb63df6cddb93ebe648aa7b05e22e
font_02_sfnt_off0000bf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF41 16136 bytes
SHA-256: 480a3578f89dbf7660a67b86e064deab81c1525361267847bccd1b539316cc31

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