Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c8e2ce8d567594a…

MALICIOUS

PDF

39.4 KB Created: 2020-10-08 11:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb175553665cdd31bf60e5f018b65b39 SHA-1: fb75d724d83b43e72ea2a4965344759545cafe61 SHA-256: 9c8e2ce8d567594a1fc860a7b267de46111e300d9b541cd509f0ff4e99e3e694
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to link farms designed to generate SEO traffic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=cushman+truckster+wiring+diagram'. This suggests the document is part of a campaign to lure users to malicious sites, likely for further exploitation or phishing.

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 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.
  • 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=cushman+truckster+wiring+diagram In PDF document text
    • https://site-1041503.mozfiles.com/files/1041503/25439187946.pdfIn PDF document text
    • https://site-1039438.mozfiles.com/files/1039438/45361710621.pdfIn PDF document text
    • http://files.surfacedance.com/uploads/1/3/0/9/130969129/pulegube_bamunobuzob.pdfIn PDF document text
    • http://files.horsesinfocus.com/uploads/1/3/1/8/131856917/todaxabav_xetiwugifobib_gaxenogisumat.pdfIn PDF document text
    • http://files.southtawton.co.uk/uploads/1/3/0/7/130738806/lukuk.pdfIn PDF document text
    • http://zazen.natsportsmed.com/uploads/1/3/0/8/130874075/wowexoni_sokisozawakebe_paguvezaxa.pdfIn PDF document text
    • http://files.alisondowell.com/uploads/1/3/1/4/131412955/ad64bc26.pdfIn PDF document text
    • http://files.touchingtheart.com/uploads/1/3/1/3/131383377/7172568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0855/6708/files/99817321780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/cyberpunk_2020_trauma_team.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8067/4197/files/thyroid_cyst_icd_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0999/1075/files/alkaline_foods_list_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/pretty_ugly_book.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_off00005c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C22 5380 bytes
SHA-256: f38d50fcaffe1207072cb313489618f4e553e4181925ca64f5aa97c9719e0cc1
font_01_sfnt_off00006e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 10240 bytes
SHA-256: 0b5f7c60d0f86e3701f3c6b6222c8b5e3684e6dfb25dbae6a6675dad11981267

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