Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4eb6357b3f2de70…

MALICIOUS

PDF

40.0 KB Created: 2020-10-04 13:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e74826dd2a995eaa30160839ab19884e SHA-1: f0005ec98f0a6ee02b5b6bf70196b17d4cdc760c SHA-256: d4eb6357b3f2de70f7cc7c2ab8c1d8b936a812685ed056487dc6d819b954631d
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://gettraff.ru/strik?keyword=free+automobile+bill+of+sale+template+pdf In PDF document text
    • http://files.silvertonnaz.org/uploads/1/3/0/7/130738622/kirifid.pdfIn PDF document text
    • http://files.celestecorp.com/uploads/1/3/1/8/131871494/7847019.pdfIn PDF document text
    • http://files.caritas-academy.com/uploads/1/3/0/7/130776738/8f5997.pdfIn PDF document text
    • https://site-1038482.mozfiles.com/files/1038482/raxosaramodepozurojokok.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/dupogewepawibuja.pdfIn PDF document text
    • https://site-1041295.mozfiles.com/files/1041295/20447973272.pdfIn PDF document text
    • https://site-1036721.mozfiles.com/files/1036721/fukasigulunopavemegu.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/bb74ba94-8fd9-4e9c-8cec-2a2cf6effc51/33130746202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89029379-31d1-4565-b7ce-f9f920d20f82/fipagarojiwufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe376ed-f9e9-4ffb-a739-7e526fd11f71/44605150372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d56bf0c-40d8-4a35-b357-eb86167eaea1/39335171841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2aeb36-da05-4a04-a3f6-cf063d87ddbc/busowomofuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8985/7174/files/motion_to_expedite_trial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/daxagabuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/24_month_old_physical_milestones.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_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 5280 bytes
SHA-256: 7bdc860acfe7c4d7da77ef61b519fa02cf8d676fc0283c49e87b296e90db49f2
font_01_sfnt_off0000717b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717B 9912 bytes
SHA-256: e526dbd3e9057396480852b541ae05073e71f4c2d49a0eec7e86637dbb25e3ee

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