Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6a54c9277e6a5f…

MALICIOUS

PDF

45.3 KB Created: 2020-10-15 21:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2faf32eea61cc3271cf075ebd5610c81 SHA-1: 331e4f9bcfdc6d3a78534bacf801a21876539313 SHA-256: 4c6a54c9277e6a5f3cb07cc1361f2f06848c32350c15e439234a2f3ea4ba86e2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to disposable hosting services, designed to redirect users to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to gettraff.ru as malicious. The document body, though heavily obfuscated, contains keywords and URLs that align with a link farm or redirection scheme, likely intended to lead users to phishing or malware sites.

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/123?keyword=bragg+equation+chemistry+pdf In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/780096.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/sepulizebiz.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87264d29476.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8832719.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/0c082e.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/5580598.pdfIn PDF document text
    • https://xogefuvoza.weebly.com/uploads/1/3/2/3/132303221/lokixuvex.pdfIn PDF document text
    • https://site-1038675.mozfiles.com/files/1038675/junubuvipodelulafoku.pdfIn PDF document text
    • https://site-1041677.mozfiles.com/files/1041677/65989418322.pdfIn PDF document text
    • https://site-1048172.mozfiles.com/files/1048172/49067692604.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/1f260ea8-2324-4ab9-9122-e8cdd7e873f8/mivegolemirurivujinemekuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c8db09-e098-432a-9003-8e8682f75814/zunokanizudoti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af8bcdc-7d9f-4b77-8bc5-bb441ef9c674/siwevebep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2648cdb-5aa0-4ed5-b111-9e46a9fb3230/92571019033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79f58b7-3ca3-4775-8997-19b831aa9faa/xewetikazixus.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_off00006506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5816 bytes
SHA-256: 436793770c28f7dc90c37aa947d9bcf1a0d1053c1b0443aa3e66405ee924757b
font_01_sfnt_off0000789b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 15000 bytes
SHA-256: c46c5667d6114b1c9a7d129e3b10aff2b1f95921447cf9b9caab81c316f3b925

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