Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c95a03ce27d2879…

MALICIOUS

PDF

44.1 KB Created: 2020-10-06 18:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc291e42d5cf05712b4ddd4f05a2e865 SHA-1: 246ce323465707e7d70c6ede34b44fadb3dcf65d SHA-256: 7c95a03ce27d2879f0b92296d16b673736724de8d18f1709543e57d4d48b3fa1
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://ttraff.club/pify?keyword=shutterstock+images+downloader+without+watermark In PDF document text
    • https://site-1044310.mozfiles.com/files/1044310/lojiributowadupemebu.pdfIn PDF document text
    • https://site-1039148.mozfiles.com/files/1039148/87316091058.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/86799637842.pdfIn PDF document text
    • http://togelig.vca1988.org/uploads/1/3/2/8/132814977/nazipupujit-mazamuwewinex.pdfIn PDF document text
    • http://nifav.ygautos.com/uploads/1/3/1/4/131452883/051bb7af057df38.pdfIn PDF document text
    • http://sepoxage.swensethlawoffice.com/uploads/1/3/1/4/131453870/fufowevimilibev.pdfIn PDF document text
    • http://xujunagin.nucoonrizn.com/uploads/1/3/0/7/130776854/2832366.pdfIn PDF document text
    • http://files.markuswalterart.com/uploads/1/3/1/6/131606550/3664418.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://cdn.shopify.com/s/files/1/0481/5237/9553/files/cuisinart_dbm-8_supreme_grind_automatic_burr_mill_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/71732234975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0614/0831/files/gefotozipexazuxazutorotoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3288/7463/files/kosimovemegewinoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/ado.net_interview_question_and_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7406/3002/files/8208415940.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_off0000619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 5496 bytes
SHA-256: f01f8e88c87697a838e56b012fdc2444f4b87079605712ec0a3289f3d40dae8b
font_01_sfnt_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 9676 bytes
SHA-256: 2a10f3d7e804f721635564aaa188380f3dfe1fc83eb7d36b3bbc72148be84c6f
font_02_sfnt_off0000952a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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