Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ad6fc4186e7a28…

MALICIOUS

PDF

39.4 KB Created: 2020-08-15 01:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 16bb99ecc793fd86c5d184a74b33949f SHA-1: 3d0b5c34a329d428e63ab27ae521b46e8b49b422 SHA-256: b6ad6fc4186e7a2828c1fd15044249dce96d2e520d75fb1a2659d1ac524cf05a
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.cc/pify?keyword=notepad+for+windows+xp+filehippo In PDF document text
    • http://files.eleanormccaughey.net/uploads/1/3/1/6/131607777/matujem.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/1/0434/6983/2354/files/78312775765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/9005942949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/39716406264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/6488365201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2804/4193/files/bearing_designation_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/wavubelexakukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/20556762146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/pepezobizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/waxonogibokejifutorerede.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_off00005cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD9 5260 bytes
SHA-256: 410f05bcd7752b7ae3012e1cc29dc474a38df974022cf8cf45a09dd1ea2ec8a6
font_01_sfnt_off00006eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 10096 bytes
SHA-256: 6a61ac6480720bc719ce0680e77a0572f5295d1165d805bb08a2e46c533e988a

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