Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf5d0cd8323770f…

MALICIOUS

PDF

45.8 KB Created: 2020-10-02 15:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 54461e91f73591a6cc0b5885418f2062 SHA-1: 7cbef51d7435cb9ace512e5ebfc70f9610bef102 SHA-256: cdf5d0cd8323770f088cb1ab945c8af24dc666bf2fe5bd415c28373012bf70a2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/pify?keyword=right+angle+impact+driver+dewalt In PDF document text
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdfIn PDF document text
    • http://nopod.whiteroseultra.co.uk/uploads/1/3/2/8/132814439/059c7ae26881.pdfIn PDF document text
    • http://files.korahcvs.com/uploads/1/3/1/1/131163788/guzit.pdfIn PDF document text
    • http://popuba.stcatherinesbrynamman.org/uploads/1/3/1/3/131398036/zadebelavitudolon.pdfIn PDF document text
    • http://files.rabbidweck.com/uploads/1/3/2/6/132696158/4191150.pdfIn PDF document text
    • http://lezanogo.liamkofibright.com/uploads/1/3/1/4/131437308/nosasunidarudosiw.pdfIn PDF document text
    • http://files.reflexgames.info/uploads/1/3/2/7/132740249/e236be888.pdfIn PDF document text
    • http://files.harderartprints.com/uploads/1/3/1/4/131406173/a4b736f548.pdfIn PDF document text
    • http://files.markbroyard.com/uploads/1/3/1/0/131070713/fa7fa41ba.pdfIn PDF document text
    • http://files.thedanielgaledifference.com/uploads/1/3/1/3/131379923/e6d631abefe8ba2.pdfIn PDF document text
    • http://files.nigellasativacenter.com/uploads/1/3/2/3/132302955/5fa3186e.pdfIn PDF document text
    • http://tejupagi.yousaidwhatgod.com/uploads/1/3/1/6/131637316/saretuv.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/4c863863-10db-496b-b2f5-0b5dcf098b36/9263511983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e70366-051e-4d76-9bbc-ba95e80c3d66/megodugoxuxekewuposokomoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a538106-7c53-40a4-9bcc-6248d42ed15e/zuzuwozafekutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4e752f-b3fa-4320-bbcb-a3fa65220b55/loduragolojom.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_off000073ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 5468 bytes
SHA-256: e22ac0c782ce03ef50a2c6f7bf192528825938685b85fb70a7257fdb38fd550f
font_01_sfnt_off00008675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8675 10480 bytes
SHA-256: d76f37b5a6213a903026791e552c8b24d497a5d7b0cd88a013e3fdc8c318bcb0