Malicious PDF — malware analysis report

Static analysis result for SHA-256 670531d0feca5164…

MALICIOUS

PDF

41.0 KB Created: 2020-10-04 18:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 227479ad93234bbb55ef8e233186ac71 SHA-1: b7ffc95d04aa5e2e51e3c2a4aa19836d59ca5551 SHA-256: 670531d0feca516457dcfc00728e70ea302ffbc78b9bd273ec274554733f22d3
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://ttraff.club/pify?keyword=reservoir+dogs+download+isaidub In PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/kifivumafivokel.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/17740020157.pdfIn PDF document text
    • https://site-1042781.mozfiles.com/files/1042781/61220110993.pdfIn PDF document text
    • https://site-1043262.mozfiles.com/files/1043262/2367562906.pdfIn PDF document text
    • https://site-1039229.mozfiles.com/files/1039229/63742857232.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/27471204407.pdfIn PDF document text
    • https://site-1039273.mozfiles.com/files/1039273/gaposuzakixijed.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/tutixigawumavisixu.pdfIn PDF document text
    • https://site-1039346.mozfiles.com/files/1039346/21849230493.pdfIn PDF document text
    • https://site-1038774.mozfiles.com/files/1038774/wobejexotamuju.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/34048301479.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/wimibololegamezoxisubodoz.pdfIn PDF document text
    • http://rafiziram.yorktownplumbing.com/uploads/1/3/0/9/130969663/nuzukokoxoturawiboxi.pdfIn PDF document text
    • http://libomuj.northhoffmanvet.com/uploads/1/3/1/0/131070356/9918494.pdfIn PDF document text
    • http://fojab.gobrazil.co.uk/uploads/1/3/1/6/131607662/5652079.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 5292 bytes
SHA-256: bb2b8e656b762d234079824ce06eadbc7e715a671dfbd17894ef9f954bf5c834
font_01_sfnt_off000071f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F4 10904 bytes
SHA-256: 5591d32bb9a09c16c4801a24d5cf7e5339966dffa0196b91fb7add7f40181c56

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