Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead44c9ebdcad6e2…

MALICIOUS

PDF

43.8 KB Created: 2020-10-30 03:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b17336e3f86a707a9da77094cac0b300 SHA-1: 4c3fafc6feef16612ae3df7d1f5dfda785a9bafa SHA-256: ead44c9ebdcad6e29a0ff3b20b7715f5fc54227db4090c95c3467241200df645
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=splash+and+dash+locations In PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/dubofugevudijemalan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5f8acd3e8a480.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000699f.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000699f.bin)
    • https://uploads.strikinglycdn.com/files/b0158cef-0c0a-451d-8ce3-481d60123cbf/13422795228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95ac5f3-ba28-4473-83af-397cef382d40/9017940052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee885f6-827e-451a-b7f2-66cf3d770742/rutas_de_transporte_publico_tijuana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a775a6-8e42-429e-91cc-b2a65b7cf53c/bogusoripavabejad.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/werelulewixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/handwriting_without_tears_preschool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e70b8d-f73a-4e93-815f-6ced39063047/kudivojoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be4167b-e2cf-4eaa-872d-6a1979deb503/xadidalareboli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6dd8c9-e666-454c-b710-e05d9dac7d3a/the_exorcism_of_emily_rose_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a48bca-7943-4b05-ae80-e8ca890be8f0/nenonupuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364e01bd-435c-4bb5-9509-a4d23abe6ee1/wifasexig.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 extracted file (font_00_sfnt_off0000699f.bin)

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 5168 bytes
SHA-256: 240174a7a79514eb86c67fd23bcf7747f726210e0e2bdadcffadf10fad92f0cc
font_01_sfnt_off00007b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 11416 bytes
SHA-256: 9d66fe988f21a5e72740d8790790b7b7729528e7f1c075af7d883bd66036f106

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