Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acdf2a1de689972…

MALICIOUS

PDF

43.2 KB Created: 2020-10-07 16:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 173154f8f3362f0a5067f90a9d49b11d SHA-1: 346316693d68315cb19a021881088c02866baa29 SHA-256: 8acdf2a1de6899720175fb8bdd5acd8ebd74c9c5ab909ab517a1e21273228533
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://gettraff.ru/strik?keyword=film+study+worksheet+for+a+work+of+fiction In PDF document text
    • http://xemuwo.theindigotribe.com/uploads/1/3/0/8/130814297/wogefosarutok.pdfIn PDF document text
    • http://fatujija.thenaturalphoenix.com/uploads/1/3/0/9/130969192/jofuf_viwux_jumeposurerur.pdfIn PDF document text
    • http://files.bookworksbyday.com/uploads/1/3/1/3/131383760/8487407.pdfIn PDF document text
    • http://files.simply-jesus.net/uploads/1/3/0/7/130738701/luwarifuninobiwareva.pdfIn PDF document text
    • http://lipiwe.pymblemedicaldentalcentre.com/uploads/1/3/1/6/131606901/fowaloxalazi_povebagobupidot_pinolulas_puzite.pdfIn PDF document text
    • https://site-1039478.mozfiles.com/files/1039478/4368332071.pdfIn PDF document text
    • https://site-1038884.mozfiles.com/files/1038884/kebotozumirare.pdfIn PDF document text
    • https://site-1036633.mozfiles.com/files/1036633/29565531673.pdfIn PDF document text
    • https://site-1043408.mozfiles.com/files/1043408/56553076958.pdfIn PDF document text
    • https://site-1041785.mozfiles.com/files/1041785/51793369700.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/39ffe730-e02a-43c7-b157-22b62e560b3e/nipovenujapokozixefebufib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193a0920-c1aa-4105-95d0-651fc07a6bb7/dujukesakomewowatakunov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcd2bc3-8645-4dcb-aa0e-4f8b6ca128ee/gutefunaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c0944a-5242-4e75-ae76-8ddf4b461146/zakadat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d47c3b-cd77-4d91-9c1d-4acd8deafb98/21968077619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47f8a1d-2a5e-466e-b365-e3987152d611/bomebix.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_off00006a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 5476 bytes
SHA-256: 7d166e1d980e45d779689d45e482cfafaa36de7b70af27237961de1cae5aea87
font_01_sfnt_off00007cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 10108 bytes
SHA-256: 542b4425b987b800c16efc538594e0d21aeffb6a62161e479558d310de9d6a8f

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