Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92d961083bdf279…

MALICIOUS

PDF

44.3 KB Created: 2020-08-18 17:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9e6686db216bf1d0663150d8c813b36f SHA-1: 6537320e91bd5d186a6d1e3e51ac7b734ae40e32 SHA-256: a92d961083bdf27936d74cf10da381e518cac2a93263bc834d64c516ed6c29dd
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.ru/pify?keyword=free+ancestry+family+tree+template In PDF document text
    • http://files.caninemannerscpt.com/uploads/1/3/1/4/131438848/d375a24e9.pdfIn PDF document text
    • http://files.atxsandlot.com/uploads/1/3/1/4/131437064/8126739.pdfIn PDF document text
    • http://latar.photo-co-op.com/uploads/1/3/1/3/131380594/67fcbf48d.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/1/0436/3495/0304/files/omfo_magic_mamaliga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/atmospheric_science_an_introductory_survey_wallace.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/40086133985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/d_d_5e_blur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/kinuratiwijamiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/hoover_windtunnel_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/bofopumabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/18782285389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/90577176750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/sensory_evaluation_techniques_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/19689233332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/28470408379.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_off00006fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 5216 bytes
SHA-256: f3e24bd507742d78dba87294de72fabeed326872484f0d455b4d36d98d67794a
font_01_sfnt_off00008190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8190 10008 bytes
SHA-256: bff79b4441ad91ac75128e3a7f271bd6f9d2bc384bdc98f14b39d14d9c830c94

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