Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbbbbe82cc3f06b…

MALICIOUS

PDF

39.3 KB Created: 2020-10-03 01:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ffd9a0d0ebad39965533789ac5116d9e SHA-1: 2924188832ca24fc20bb3c34e4c4753d716d50c8 SHA-256: bfbbbbe82cc3f06b6ad7a654b426f4a5830080a1b6f5db2ddc4e503fc72ff875
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://gettraff.ru/strik?keyword=bcnc+tutorial+pdf In PDF document text
    • http://xenotox.kristamaysart.com/uploads/1/3/1/6/131606051/686ca9.pdfIn PDF document text
    • http://sonug.thegreatadamos.co.uk/uploads/1/3/1/6/131607600/5907015.pdfIn PDF document text
    • http://wuwenid.allacadenza.com/uploads/1/3/1/4/131406656/tenasem.pdfIn PDF document text
    • http://files.rbryantsmith.org/uploads/1/3/0/8/130813531/lekavobesufexej_zaguve.pdfIn PDF document text
    • http://gilide.pemarro.org/uploads/1/3/1/1/131164538/pojirukutebas.pdfIn PDF document text
    • http://files.canefruit.net/uploads/1/3/1/4/131405997/piwitatuwawom_wazinovufe_mifira_tujebibaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2f2c1f-97eb-4b91-8698-20eb7f9bf86a/gavawasuzosibaxopezej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31f6680-b2b1-4e06-b601-94567a8765d4/23124505568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb95a63-9b21-4566-9cdd-4fdc070b8f6a/monatititenaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/51120256912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1738/6659/files/8508234919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5381/4438/files/the_good_psychopaths_guide_to_success_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5385/5132/files/8767096879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1189/9029/files/dead_rising_survivors_fighting_each_other.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_off00005c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 5020 bytes
SHA-256: aaac03df709185f731dbfc0a1e74d64d453eff6047c2d6c2917219e17e50a115
font_01_sfnt_off00006da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA9 10196 bytes
SHA-256: 5062d8d274a78d294ea73173db370018c3601eb9a460de4334cc4e5c83b85e67

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