Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f86206334d21b5…

MALICIOUS

PDF

54.6 KB Created: 2020-10-31 13:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7982a30acec21026a8b227c684c2175c SHA-1: f8bb5650c148a131d03ac86a35344e080fbdd100 SHA-256: 15f86206334d21b5d7945a453beda1c46b060bc84170a51473824ca31d5f2703
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=isabella+colored+dachshund+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f98a2cb205b2.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/nuwumelotinubapi.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/zozegeje_vewigapameleso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393925/normal_5f9cfbbb02ff1.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/dumupa/14125384261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a3bc15-3364-49b5-859c-60e8fd71e8c1/90770717122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/49772194861.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/10_canciones_infantiles_letra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306a6cb9-e649-4995-830b-127b21358454/malena_movie_2000_online_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/blade_and_soul_new_player_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/jasotuginozotedezewur.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/87382537069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af52bb8-9942-4cbe-8919-0bb4df8e9c0f/losibogiwoxovawuwimed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57f13d1-6efd-4982-85f4-f027564b3308/49338605123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507191ca-1e0e-4da1-a95c-b41d55423976/easy_welding_rods_australia.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_off0000955c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955C 5184 bytes
SHA-256: e9c4cbe2b0bcd6a0cd4395d0cb8f5742fef406221fdb04f49b9bf803a9851a2e
font_01_sfnt_off0000a6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F1 11664 bytes
SHA-256: e00ed2c3a5c57ebabfd08bbdec4044b6b407010b1e6e607b27a34b94cf7670f2

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