Malicious PDF — malware analysis report

Static analysis result for SHA-256 47cab20971be4f85…

MALICIOUS

PDF

37.3 KB Created: 2020-10-31 14:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 70fe6b6b95f807a58276f912a267a3c0 SHA-1: 5317ddf49420467eb2022d8e510d9e503cf6a95c SHA-256: 47cab20971be4f85b79575d85fec8df13556c9d38c1c3af1787b6f7d6afea300
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/123?keyword=funny+llama+pictures+gif In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5f9c5c2916cc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5f972272ba1ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5f9ce6cfe94d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f88771d9efec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f8d6a782471d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/joint_stock_company_conclusion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40d32fc0-7921-43d5-aef1-156414caf441/navajo_loom_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8402/0898/files/gebisakizijedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc165795-c328-495e-b26b-69abd31b55ff/free_download_hp_laserjet_1536dnf_mf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e726d97c-6202-4420-ab59-0ae04d9232ba/tesugowumugipidawenewiz.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_off0000562a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562A 5392 bytes
SHA-256: fa7a295d187a8b7abe07d254800494f4413487776450f51939b151dd3bc1dca8
font_01_sfnt_off00006879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 9480 bytes
SHA-256: b3ea816950f49b174a9a2ef5fb3a4fa5e013aa3ab57a86a0dee32b781ac7ab8a