Malicious PDF — malware analysis report

Static analysis result for SHA-256 e428f5e7fa895e4b…

MALICIOUS

PDF

57.2 KB Created: 2020-09-30 12:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5f94b0ebdc70e3eb7d6a755f2955524c SHA-1: b15536101e4addd84cdd19f47ac80c024e66cad1 SHA-256: e428f5e7fa895e4bedfb9ecf33010b0d98d0ec8b1570820d104a3bdb246ef2a6
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://gettraff.ru/strik?keyword=algorithmic+music+pdf In PDF document text
    • https://site-1036985.mozfiles.com/files/1036985/461994182.pdfIn PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/87302273651.pdfIn PDF document text
    • https://site-1038612.mozfiles.com/files/1038612/88871199647.pdfIn PDF document text
    • https://site-1038831.mozfiles.com/files/1038831/43257262017.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/86071365705.pdfIn PDF document text
    • http://files.thecollegiatechoice.com/uploads/1/3/1/1/131164023/tozidajugeres_derisapeluxibe_wetidaj.pdfIn PDF document text
    • http://files.parkpostoffice.com/uploads/1/3/1/4/131453132/mesodutafovit.pdfIn PDF document text
    • http://files.barnfeet.com/uploads/1/3/0/7/130775997/refumagu-jitevetojiwuti-nilok-tejawugedipe.pdfIn PDF document text
    • http://files.conniesscreations.com/uploads/1/3/2/3/132303359/povabenena.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/somakowerupukafijurem.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/newoxakuledokegepukup.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/83842265302.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/52038362773.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
    • 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_off0000959a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x959A 5004 bytes
SHA-256: 8ee9d4dfde9f2d5c9af06014c749401ea0d158da3a06e9bb1d4fe0a44b5a7a77
font_01_sfnt_off0000a6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A5 10340 bytes
SHA-256: 870385ce1986ef34933a8d1bdbd2e36debad8c4e22d61cd3d88bb61a60a86f95
font_02_sfnt_off0000c9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230