Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0dfbf4f31dbc1b…

MALICIOUS

PDF

65.9 KB Created: 2020-10-19 05:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e59cee71d9aea51efc65c40bc469412 SHA-1: 5570c650ad76fe8ca3d3d82bf3cfa524d7b75159 SHA-256: 9f0dfbf4f31dbc1b041f64590412ccf41e8311f999dd153394df56873f551fa7
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://gettraff.ru/123?keyword=8th+grade+algebra+equations+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5f8cf323974fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382412/normal_5f8bc3e643e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f8ce0622a431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5f8cf29ca0ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8abacc94a83.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/159c9a12-d1c9-4b7f-9d61-a26fdcefe7a4/pofipapudisepigopebuparax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251dfacc-f236-4746-bc07-0e8d87feb5e1/tewigowebulesadebumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee3ce52-bb3b-448f-b8f6-75a630a1e1bd/benasufasaporelafetovesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65c888b-b723-4e97-936a-04a0f90684e3/6063719024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9503a3-98d8-4efa-95e3-783430ba631b/76199780280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bbc909-cbc9-4a4e-bbd1-90f613c500bd/mojunaxosewonuxeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6573/9930/files/12625038002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/witadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2242/0638/files/97562855885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/29235223256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9445/3661/files/matriz_energtica_brasileira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4564/9574/files/12180580965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/99307185438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/98328460485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5477/5458/files/90842351730.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_off0000a5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 5552 bytes
SHA-256: ddd9972c396e933d016f9505cc7e8bd012a227249a8a619b919f9de7c4c2f04c
font_01_sfnt_off0000b868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB868 16736 bytes
SHA-256: 7eee1dd28008437873fef8c8fbc5632a8db01a8518e836e28f806632daac4cbd
font_02_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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