Malicious PDF — malware analysis report

Static analysis result for SHA-256 8add44b85f8a05d4…

MALICIOUS

PDF

37.0 KB Created: 2020-11-06 22:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 041b36f6a867160bae33465a7f39bb0b SHA-1: c70fee3a161dce20cb82cf85f13fcbdb7a6a2bb4 SHA-256: 8add44b85f8a05d48112e0c9bc2c7d9eb39169681acf4d323a245a9eead8febf
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://traffking.ru/aws?keyword=100+bad+days+roblox+id+nightcore In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f9b52bbe94ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5fa332e3904a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f8bce898b405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f93fb114d413.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/0aa67d18-0092-4174-bd69-12776c8fefdf/50551964219.pdfIn PDF document text
    • https://vixorujedujo.files.wordpress.com/2020/11/maxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/star_tribune_chatham_paper.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://wotenopofe.files.wordpress.com/2020/11/budixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/62880778987.pdfIn PDF document text
    • https://fezubukuwone.files.wordpress.com/2020/11/12157212159.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/legend_of_zelda_speedrun_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/givosuvofipogo.pdfIn PDF document text
    • https://jesulukon.files.wordpress.com/2020/11/50831115919.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/kadevijukatilapivakus.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_off0000454c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x454C 5400 bytes
SHA-256: a90c34baefd923f35731ed9ce2f3ce67236117901b391c6ffdf7321054e6894a
font_01_sfnt_off00005797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5797 9748 bytes
SHA-256: 5289f3d9ad8b2e54b315e3cc602de1242e373521fec579182d4d19c9b112caf3
font_02_sfnt_off000078ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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