Malicious PDF — malware analysis report

Static analysis result for SHA-256 491181e441969803…

MALICIOUS

PDF

39.5 KB Created: 2020-10-07 17:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 41405c20fc7344a15d89ca24b90fdaae SHA-1: 598642ff81898f8f730753673f5f902a5d4f460f SHA-256: 491181e441969803104a7b69d37ceaef4220cf52f95063723d2363deb6790234
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ttraff.com/pify?keyword=bose+acoustimass+123+manual In PDF document text
    • https://site-1041501.mozfiles.com/files/1041501/bexexelekakewebu.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/159451193.pdfIn PDF document text
    • https://site-1042867.mozfiles.com/files/1042867/4596522318.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/robunibak.pdfIn PDF document text
    • https://site-1048173.mozfiles.com/files/1048173/sawapuvavamoxemezomuxa.pdfIn PDF document text
    • http://files.benedictnnolim.com/uploads/1/3/0/8/130874026/6207320097.pdfIn PDF document text
    • http://files.wayfarekey.com/uploads/1/3/1/8/131857152/924b113f59428.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/1/0462/3820/4053/files/94401905511.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_off00005c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C00 5248 bytes
SHA-256: fed934d7058c3b029c1157f7e80b77a2841784ab6a865e9451fa33a0578e28f7
font_01_sfnt_off00006dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 10340 bytes
SHA-256: 6522bd2f67168b8274d80f3f4554aea1df00ea7f46d00f4ff7e338e8dea4ce7b

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