Malicious PDF — malware analysis report

Static analysis result for SHA-256 6865d0e9b0ae72a5…

MALICIOUS

PDF

39.7 KB Created: 2020-08-27 17:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 432b4634d5ea3bbbada07e0357725942 SHA-1: ce85c42d4b9ab376724d07c58b0a7186e78a4fea SHA-256: 6865d0e9b0ae72a568e514ecc821ee428e8c640ba8f421212f2582a9ee76c800
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.link/pify?keyword=lettre+a+un+notaire In PDF document text
    • http://files.sunburstchefandfarmer.com/uploads/1/3/1/4/131453484/9003999.pdfIn PDF document text
    • http://files.prcpartners.net/uploads/1/3/0/8/130814717/wupevasas.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/1/0436/8993/5003/files/central_air_conditioning_system_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/software_testing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/campos_de_concentracion_en_espaa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/67565581986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/67520771633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/jizemivamabizajenuzika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/96720019405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/ontogeny_recapitulates_phylogeny.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/xilewimolodobozilakeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/bawiwoviwumirag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/2881979626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/40435054629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/43048797892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/43325118670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/nilovejijin.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_off00005ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE0 4412 bytes
SHA-256: 663741f4c4bdf72a3a0ed1525b708a7448b067c4cf6da5d8c68c71ec49d83ad7
font_01_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 11344 bytes
SHA-256: 0ecfbff63c3a29c3bff6d33dfdbff9c9318f73f83b613232997e9da6ac3b41d6

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