Malicious PDF — malware analysis report

Static analysis result for SHA-256 668595c2f8432878…

MALICIOUS

PDF

45.1 KB Created: 2020-10-06 18:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b339cdc8afb0b855543890ec044ec23 SHA-1: adaf2f66fcc65bffd5126d818a166a38dc2a8795 SHA-256: 668595c2f8432878ecdd3e87f8919f7e5ac3cdaeccacc43c6ff2b85f279e6edd
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://ttraff.club/pify?keyword=ip+addressing+and+subnetting+questions+and+answers+pdf In PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/14972401271.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/80542825860.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/xorobobomadi.pdfIn PDF document text
    • http://files.dorkygringo.com/uploads/1/3/2/7/132710491/jupesibekokibo.pdfIn PDF document text
    • http://files.michaelcgavin.com/uploads/1/3/1/6/131607075/4188521.pdfIn PDF document text
    • http://poxumuge.slyxiong.com/uploads/1/3/2/6/132681361/xewubixabewir.pdfIn PDF document text
    • http://files.foresightvisionlab.com/uploads/1/3/1/8/131856257/zuneba_kezuvelilaninuw.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/70a9fda8-4310-4aee-bff3-5c27795890b0/15301668463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f68f67-ebf7-40df-93f3-3b679d67907d/7267920924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21be34e4-5a02-4356-8820-a95ebec8e3ff/nokipowaxikavorifug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9e2e54-d25a-444d-b8f0-4f2b63f1983b/90225476241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a98af6ab-d23f-4fe8-bdca-1bb839bae971/44539113906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca4b771-8369-498a-ae69-c1b6ce3ce118/21103804435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11d2f53-ea4e-492b-8a99-bf2b3a6a1c1c/rinonupajaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce430c2-a690-43bd-a2f0-6b312f9ced79/rukesinenubuwav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf19adb-7ed2-4770-9d8d-4d88a3c89d13/nirisigof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927bae39-53da-4214-8e21-424b1e7a9df9/todedoripusejudu.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_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 5472 bytes
SHA-256: 279f264021ff5d47a861792f1f5486b947db197d73fe9ca9f5c5ee73d2e8d77e
font_01_sfnt_off00008463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8463 9996 bytes
SHA-256: 73b7c6e215ee4dace9ab103d79ed4b57d82917df28cd0cfbf7e27b4f60a16c5b

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