Malicious PDF — malware analysis report

Static analysis result for SHA-256 480183a04921b300…

MALICIOUS

PDF

47.6 KB Created: 2020-10-11 11:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 4afbaf0cefd4a1b0b66c27df97971597 SHA-1: b7aabb5c746c1f304310a55b97bfddeca7642116 SHA-256: 480183a04921b300367f0bb20eacdd67f712d47c05b10413b73d581df169852e
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://cctraff.ru/strik?keyword=leisureguy%2527s+guide+to+gourmet+shaving In PDF document text
    • http://files.stleoscatholicchurchikeja.com/uploads/1/3/1/4/131453267/71e1be2.pdfIn PDF document text
    • http://dodabesug.stalbridgearchive.co.uk/uploads/1/3/0/7/130740537/a71a147d241.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/dezafalefuteraron.pdfIn PDF document text
    • https://site-1038669.mozfiles.com/files/1038669/julorajomesagazuf.pdfIn PDF document text
    • https://site-1038830.mozfiles.com/files/1038830/keruv.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/004af7d2-1e80-4dd1-a652-e943cf7eff5a/ligereranuvakizupen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba38945-ad6a-4fd4-8ede-cb1c7367fb48/sasoxuvesifuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82fca56-dcda-47ce-9e6e-bc37c00c7878/pipanokabitapuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f361d027-2865-4866-9096-198502382bac/69126380275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1941/1878/files/66700806477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5089/2454/files/jackson_flying_v.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/arturo_de_crdova_y_marga_lpez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6998/0320/files/why_are_self-representation_skills_important.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_off00007b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13 5344 bytes
SHA-256: 54c18a8790cd977a8ac527921a2090e5748c7b7e60da9c9e5d11238effd84e9c
font_01_sfnt_off00008d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D29 10816 bytes
SHA-256: 5378e0d4ce3049a157f9d2b1ee468b38be10ebde46de5ba8a22652fe81144e74

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