Malicious PDF — malware analysis report

Static analysis result for SHA-256 6647cbb171b1a304…

MALICIOUS

PDF

42.0 KB Created: 2020-10-01 17:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 019c704a8eaa3d8d0414f0263d669791 SHA-1: be3947c151b7fd32b6a1cbd1d6789e6951894d57 SHA-256: 6647cbb171b1a3040c0a9033584a5138016da2c7668ebab136e8349c4ec96a87
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/pify?keyword=pigeon+river+michigan+fishing In PDF document text
    • http://gozeru.hillcresthuntingclubincllc.com/uploads/1/3/1/3/131384380/212762.pdfIn PDF document text
    • http://gevewalu.dirtyharryserotics.com/uploads/1/3/2/7/132740351/mufojowutube-jumiwi-robolomavuvev-tovijezaroj.pdfIn PDF document text
    • http://teneworen.vargislab.com/uploads/1/3/2/3/132303035/70a5e79745a.pdfIn PDF document text
    • http://zuwatu.madhatterspopcorn.com/uploads/1/3/1/4/131437350/vevedilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/76738457342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2786/0122/files/rodeo_houston_2020_dates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/family_guy_quest_for_stuff_cheats_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/19753557672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/1d4chan_ops_and_tactics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e3fadc7-25f6-449c-93af-dc8fcbb7dd38/guguse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39934d59-fec4-49eb-8758-c1608f5d5a49/48279595313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f571f9-c9b1-47a2-9216-0e6d8e68a2e8/rokejogevugewufidadutoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcd75ce-b973-4532-b336-6892a8b8ba1a/gimunamenipozud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4e8e8f-4e50-49ea-817b-9b29ada7f229/39856366045.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_off00006539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 5324 bytes
SHA-256: 5b7e969ed384f277de34a9c78f59be7a9ff61b29104d01d79548c74104a7215e
font_01_sfnt_off0000773e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 10384 bytes
SHA-256: 04f8f607555792f2f9e175868f053c87e9507aaa16155566a1c291d7bcbfdcfb

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