Malicious PDF — malware analysis report

Static analysis result for SHA-256 634fcd3fd98df9ac…

MALICIOUS

PDF

37.5 KB Created: 2020-10-09 10:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 52ede0415b449b40dd8ed29d41a57070 SHA-1: 2f6f6ca49b5229146c2410a59d408de55a66fdee SHA-256: 634fcd3fd98df9ace41f2a7314f26665b25f3ab5ce5c31d37f399044edc0e8ae
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.com/pify?keyword=borderlands+2+neogenator In PDF document text
    • http://janevefi.neutkd.com/uploads/1/3/0/7/130775169/29f6702.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/1/0494/3049/5399/files/gumatamizokatolamez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8197/6990/files/inverse_functions_worksheet_with_answers_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8732/2522/files/progress_in_mathematics_workbook_grade_6_teachers_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9358/1212/files/list_of_professional_associations_in_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/let_s_be_the_parallelogram_determined_by_the_vectors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/wilford_brimley_diabetes_cat_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/15572175734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8292/2646/files/desynth_leveling_guide_ffxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36f306a-a3e6-45e5-aa52-1c212b1114d5/67753704394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159ad6a8-0977-42d4-b34e-762948de2ed2/82256123147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a2b281-134c-411a-833f-1188c6214532/90791728583.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_off000054b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B7 5172 bytes
SHA-256: d1eeedc226e63157c207f8eb6489ec954b9838c2f2725b788e124b356de38149
font_01_sfnt_off00006660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 10332 bytes
SHA-256: 55210ed0c033968f3f28efc5328652c789da4f34753934197db106314de11733

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