Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0536b8aac9857f…

MALICIOUS

PDF

43.9 KB Created: 2020-10-28 22:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b6bc0f75babdbe6642622939cbfacab5 SHA-1: 96fb19e7ee2fcd62a407cc49863f39859eb7847b SHA-256: dd0536b8aac9857ff2f7161b67a218d969eb9c6001430eb550aef78b74e35ac2
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://ttraff.me/123?keyword=colorado+license+plate+lookup+free In PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/9616277.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/008d198.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/1/0434/7658/2552/files/capitol_hill_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5425e07b-bb02-4581-b9f6-90d583eed392/92421139321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79443278-7749-4c74-bd00-22a3977b7e75/45769079475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20fcc24b-01b8-44fc-b5eb-26ccd030387a/descargar_los_7_habitos_de_la_gente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72dd893-bf5a-4563-848d-2af5fb995239/47166465354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76dc39a-120d-48f7-9191-053f79806ad4/juvef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adcc2476-56c5-4a3d-80e9-9e0aa5b1fb36/5655481324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17890b46-ff27-4f69-85a8-02d982491b4c/69660340492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc02dac5-f33f-45b5-a11a-74bb44cdfe4f/lotanuterasobufunewon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/regulation_of_lipid_metabolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963f25ff-0541-4432-8eb4-566ba22d84c0/52488471687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42576d6-2b9d-45bd-8c4a-101e10e7ce21/70513175762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e09144-c957-4c2e-a034-087dbbbe60a0/xexoxirinuguwubonaluvif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/forumias_prelims_test_series_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f760c8-1430-4fc5-a673-ca7c0a3395a8/33648133770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d215150d-cacf-4f16-a359-8f90339c1862/jozawajubirewawowut.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_off00006d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 5120 bytes
SHA-256: 3d961c0d2304cbca23c0720940a888c70a1deed48dc85843b33c9cc2f4ef0bbf
font_01_sfnt_off00007ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE8 10288 bytes
SHA-256: a27a364d45aca21a093ea7e7b1fe0d5a4591e1b7096218b3a76aff54ff96424a

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