Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dacf348b1b82fd…

MALICIOUS

PDF

45.4 KB Created: 2020-10-23 13:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: c3108242b7834bcf5c90817e1a0f5add SHA-1: c3e9a19013410946cd0cfbacf475985eb9b8975f SHA-256: 51dacf348b1b82fd0db7540ce516dbade0502ab96777391cdafc4c59f405851f
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.com/123?keyword=google+calendar+icon+show+date+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8730351498b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5f8dd276a6d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f8dfdd890a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f888f612fc52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f8c21a3db410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_5f8f51050897e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8ceb203f658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5f8ef81fe5f3a.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/82762.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/jinitorip-bolag.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/xipupowejafu_sonenuwigagin.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/xobapererejogefe.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/13836545257.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/dabudafuxipinezemefi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fedawefeke.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/metumitegexipejawaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9661/9193/files/41168991493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8256/6811/files/jiragixegibobadomotikifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/40276968858.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/character_design_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/love_marriage_vs_arranged_marriage_group_discussion.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/educational_assessment_and_evaluation_8602.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_off00006ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 5324 bytes
SHA-256: 281e75414b8eef91240743d69e5308b08e7960fbd3292ae775540cbaa6eaf3c3
font_01_sfnt_off00008107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8107 10808 bytes
SHA-256: dc33cd77f6eb092a9f8966a138425b748b68b8cf39498e907316fcd600327122