Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e54cbf17b844d7…

MALICIOUS

PDF

46.1 KB Created: 2020-10-02 13:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 07f2caa69bc12ea298f9b4f904de1488 SHA-1: faef534bcbc87156fc06e91983a0d73b52886a8c SHA-256: 19e54cbf17b844d74c584705443d231950e92dc7dfebee0325e0780667eabd7b
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.com/pify?keyword=arabic+pronunciation+chart In PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/54676655323.pdfIn PDF document text
    • https://site-1038525.mozfiles.com/files/1038525/rafujosoxonofomup.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/5172306842.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/vipop.pdfIn PDF document text
    • http://pakelitu.airbrushofcincinnati.com/uploads/1/3/2/6/132681144/8580919.pdfIn PDF document text
    • http://files.jksporthorses.com/uploads/1/3/1/3/131383297/tukadafujotote-xevajevamep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8be04dc0-79f2-44b3-82e9-9b97a6bb8320/jijolajugixibesirawepid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d847e8de-fc88-4c54-844c-2edd01b539be/tolilon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17732421-9ec9-43c0-8d3c-4a2a6806c40c/75486260308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0386139-9a06-4418-837d-ba2a1c2da55f/gubuxofovatekadarudeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d33f130-6af6-403d-b524-f7d5bf542f80/9517421985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9067/4591/files/charleston_county_recycling_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2890/4093/files/44747511490.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 4704 bytes
SHA-256: 73d456d98ee126d772a9f4cdd8d5f195b4e45accf79a8c648451ac34a5685d24
font_01_sfnt_off00007a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A85 10352 bytes
SHA-256: 3abdc2b8ad4aa0393d927c5bad65a2f6e9896f301609c3e7021a0f80e3c2f068
font_02_sfnt_off00009de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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