Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11df1a9d2843dae…

MALICIOUS

PDF

42.7 KB Created: 2020-10-11 21:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0d913129e2e56c1b312e8a91c6c875e2 SHA-1: 9e0f4c6e36a4fceb75601b5ba67a5bc2d1ffa6b9 SHA-256: c11df1a9d2843dae3eeeca88d75074cb98c581e956c6208eb41dd9d3ba9ed531
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.link/pify?keyword=area+code+506+scams In PDF document text
    • https://site-1043215.mozfiles.com/files/1043215/tifavunejofexuwake.pdfIn PDF document text
    • https://site-1043176.mozfiles.com/files/1043176/fojovapixegilup.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/29438208217.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/58214815217.pdfIn PDF document text
    • https://site-1043132.mozfiles.com/files/1043132/ruloded.pdfIn PDF document text
    • http://pufemad.zeropointmechanic.com/uploads/1/3/0/7/130775683/dilaxafogow_vatozuzirekisit_dotesikipepubeb.pdfIn PDF document text
    • http://liral.ameri-alarm.com/uploads/1/3/1/8/131871597/3890604.pdfIn PDF document text
    • http://files.vetiveracupuncture.com/uploads/1/3/1/6/131606984/aedbb3c54c7e8.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/28b321b0-3d8b-4102-9409-9b226427de0e/56120542386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31bf4a02-0d21-4989-b2d5-487f2cc371cc/5685785214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/043f6840-5d65-45ad-9210-5aa1d6434ca9/vaxewipasudepexoxope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8d4ab5-7cdd-47df-98ca-caa28c9dc4b3/10893504995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3781694-cccd-4138-8bc7-a2260395afe6/24780035934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aefeb28d-894f-4e4b-9044-2710f998dbf5/60461482845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2155bf3d-bc5a-4aea-bd15-dc34caed4e1e/17749065395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ce6e35-78a8-46b2-afd1-da282dd537fc/komomawosuxed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5831198-b7f5-44cb-9e3e-b0fedd922b25/zadujiwizowigesimumi.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_off000068cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68CF 5460 bytes
SHA-256: 73db9186e31fa830f72c0fbb920162a5a442b87d63ed6aaa0cc5db5571b1e68f
font_01_sfnt_off00007b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 9988 bytes
SHA-256: 2cd6e659a98b28cd397c83ea21f7dd89d690816b8b42f917ab32edeb0bcf907f

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