Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f9f12f026b516f…

MALICIOUS

PDF

42.0 KB Created: 2020-10-11 20:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: eb985dbcd2322383e252da942fc23746 SHA-1: 46c9b0909b89a9252e29620d2e4659bb9d68aa83 SHA-256: d1f9f12f026b516f32ad3d4de3b0aa2887707e6fce92664660579be9be5dab14
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=the+franklin+scandal+pdf In PDF document text
    • http://jebewe.thealpinerovers.com/uploads/1/3/1/4/131437402/af20b268965ee.pdfIn PDF document text
    • http://mesakadax.wc4s.org/uploads/1/3/1/8/131856160/81397125.pdfIn PDF document text
    • https://site-1040568.mozfiles.com/files/1040568/rozuwataninefuk.pdfIn PDF document text
    • https://site-1040379.mozfiles.com/files/1040379/taxafasidukijadata.pdfIn PDF document text
    • https://site-1044236.mozfiles.com/files/1044236/rijebosibubewa.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/1/0430/0505/1029/files/55988239546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6616/9246/files/7586121913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5949/2517/files/mekavibagoxabosokakovase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0631/2093/files/tech_tire_repair_tools.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_off0000669d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 5256 bytes
SHA-256: 026cecc148bfb50f598c97e6fb280bf9013ee0089184f4a85303d321d21f3ead
font_01_sfnt_off0000786f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786F 10452 bytes
SHA-256: 70568d263c0def334d0384b7a22a3f8c8b6e067fbee720da55a12e0ab9b3b6f2

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