Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1225b71bd4f833…

MALICIOUS

PDF

40.0 KB Created: 2020-11-02 09:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ace90aa01a5965daf38e5a5c29ea526 SHA-1: 76ffb05bc32b5cac69035d03d625144292ec7ad6 SHA-256: 5c1225b71bd4f83390d07d660f76a79c0362ed77e3c13b1aab645ea538ab5096
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to payment redirection, instructing the user to update bank details. It embeds multiple links, one of which, https://gettraff.ru/123?keyword=work+in+exchange+for+rent+agreement, is identified as a malicious redirector. The document's structure and embedded links suggest it is part of a phishing or business email compromise campaign designed to steal financial information or redirect funds.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/123?keyword=work+in+exchange+for+rent+agreement
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f9a9e9c83fe5.pdf
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f92f7a73be24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/petikamov/79247834695.pdf
    • https://s3.amazonaws.com/fasanag/learn_autocad_2007.pdf
    • https://s3.amazonaws.com/suzixegazunow/90658364563.pdf
    • https://uploads.strikinglycdn.com/files/c2047d0f-a297-4bb8-8966-80f5eeef4090/callaway_great_big_bertha_driver_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/3eab79f2-332f-4206-972c-fca70fea92ee/matt_chandler_philippians_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/d64d5f0d-5e66-45c0-9fdf-3e743f22527d/busabiwutexiruved.pdf
    • https://s3.amazonaws.com/zuwimadaneb/86488094752.pdf
    • https://uploads.strikinglycdn.com/files/de261e02-e5d4-4365-bfaf-7e4000548f6a/mazelodavibidanom.pdf
    • https://uploads.strikinglycdn.com/files/85dc5840-4a21-4dc0-a29c-2eb1b00fd920/tamer.pdf
    • https://uploads.strikinglycdn.com/files/741e53d0-ce14-473a-b888-d63ec569ba13/23866497706.pdf
    • https://uploads.strikinglycdn.com/files/cd5c059f-c8c1-4e0a-a193-eeb2879d6a99/11031152192.pdf
    • https://cdn.shopify.com/s/files/1/0459/2241/8839/files/eastern_air_lines_flight_401_ntsb_report.pdf
    • https://uploads.strikinglycdn.com/files/4aade7bd-16fa-40d6-95ea-158631e49d85/the_secrets_of_underground_medicine_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e9a.bin
27b2e151f0c47d781c115d066a3e495bd8cfab29d89c0d155bdff6c7c9194f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 5228 bytes
font_01_sfnt_off00007057.bin
0b927adb1069c553ae6d55b2272046a638ec7332fa345a53379c5ef23af74e04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 10156 bytes

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