Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef62299f549e1f9…

MALICIOUS

PDF

52.8 KB Created: 2020-08-17 05:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 207b2d5e82b29417374d8ff69dd0412c SHA-1: c5234d862eef6fca41e82eb661e2373198965867 SHA-256: 1ef62299f549e1f930bfafab6a1a33bdf8e7e49e1b7a6d0cefe528a69296b07b
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=english+to+french+dictionary In PDF document text
    • http://tawesu.theallinallministries.com/uploads/1/3/1/3/131380183/kokap.pdfIn PDF document text
    • http://files.cbustherapy.com/uploads/1/3/1/4/131453645/retevoruladex-bupifa-xizogifajupiwuj-kaxima.pdfIn PDF document text
    • http://files.snowyriverfarms.com/uploads/1/3/1/0/131070307/titozuzu_newasub.pdfIn PDF document text
    • http://files.fredsfarm-rwanda.com/uploads/1/3/1/4/131411539/leroterozuporega.pdfIn PDF document text
    • http://files.orenpizmonylevy.com/uploads/1/3/1/4/131483201/2d21b52.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/1/0435/1351/2100/files/ahmed_deedat_franais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0539/3570/files/kokejovafotitijepamaveta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/twitch_chat_in_obs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/80599698756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/54534179332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/iata_airline_codes_list_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/dixadalobepavorasigar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/zemugurur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4002/9344/files/porevodotuzodenifezoneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/jarobadujidepan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/introductory_astronomy_and_astrophysics_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/barbituric_acid_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/fukajebabuwip.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_off0000914c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 5344 bytes
SHA-256: 838814cb87bc385776aa78d30afebdda97b170ee40bd96f6877399869886e223
font_01_sfnt_off0000a373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA373 10120 bytes
SHA-256: 5654f08bbfa0c1d909b61dbc7e7a0e2061abef0a944b93150ab0da393967cf68

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