Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d8ef85d1a6c24…

MALICIOUS

PDF

40.3 KB Created: 2020-10-07 11:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: accd346f3bef9e3d33fefeff830f5de5 SHA-1: ada90da19eb2fa74d3e97d809a63daf7ff0f4562 SHA-256: 4e6d8ef85d1a6c24c13c2cbfd07a7ec0df1728de4ecb3da346895088b836363b
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.link/pify?keyword=parasite+real+screenplay In PDF document text
    • http://files.claytonmooney.com/uploads/1/3/1/4/131454383/bfef83c.pdfIn PDF document text
    • http://files.stemilyreled.org/uploads/1/3/1/3/131380619/gimipama.pdfIn PDF document text
    • http://files.beccadoringphotography.com/uploads/1/3/1/3/131381109/senitajoxanexepazuka.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/1/0441/0041/9736/files/ibs_shortness_of_breath_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5956/9055/files/kohl_center_seating_chart_view.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/realidades_2_core_practice_2b-3_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1389/7372/files/sokibasaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e77a83-87af-4273-ace7-8211134ab17f/tosevetumazopikaxerenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92345421-69c3-463a-a536-fe38cdf110d8/22699126404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf89800-4c2b-4c66-a913-db3f1d30efb4/gijovosadawuzevanenorewor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc6e46b3-26b0-42fa-871f-c55fdbd99dcb/pufudovafuzarapabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8530b9-90e2-47e9-8c28-26763d0ce2c7/navibenawoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/297470af-99cb-42bb-86fe-0a3379af8ec7/japemixepajav.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_off000062b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 5028 bytes
SHA-256: 5c3e7b5e9f9f084f986a13a6f3648a84770babfcd7745f770507079b3e4e8ddb
font_01_sfnt_off000073e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 9604 bytes
SHA-256: be4004407eb00eb0119c64759306bb8a608ea37600bb72f9f13a5c36df911b32

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