Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d45eae0dcf4e376…

MALICIOUS

PDF

45.8 KB Created: 2020-08-02 15:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b883f935ee091db5dbfde8fffc3ef5da SHA-1: 26ead9102db4ad8af71b77063af4e6ebc5dc1078 SHA-256: 3d45eae0dcf4e3764e9834474532bdc39f30fe7b6771eac081abbcb55ade7cc4
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=final+fantasy+14+act In PDF document text
    • http://files.fingerhutcakes.com/uploads/1/3/1/3/131381612/venopakuw.pdfIn PDF document text
    • http://files.pacescholarshipacademy.com/uploads/1/3/1/0/131071082/xikujuboretovamulex.pdfIn PDF document text
    • http://files.kjwestdesigns.com/uploads/1/3/0/7/130738918/3052095.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/1/0437/5255/4657/files/26484302010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/xavodufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/26892857766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2083/6254/files/80002260605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/wewale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/kupulomedanupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/kokipapufaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78214852322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/69102764768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/10487004179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/82640042669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/marovofetamuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/dakofegovigiponipetofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2883/0625/files/zefetofuka.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_off00007694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7694 4976 bytes
SHA-256: 995c605fd6d14b3932af473169fe4bc2992c13998d639329d7279c864fbb6e04
font_01_sfnt_off000087b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 10152 bytes
SHA-256: cf5fc465183c4a9da59b8a1a0be799765a48d8f88c963c8c2ffd7a481e906f0b

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