Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d35a20b3589293…

MALICIOUS

PDF

50.0 KB Created: 2020-08-17 10:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 826c28260859e97867c2b8f357141776 SHA-1: 296ee33070060b5e6d620d2dfd223e3e3486aa74 SHA-256: 50d35a20b35892935a118dbf04855e97ea68b1dbfbb83da52376e45d106ba88e
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=indeed+career+guide+resume In PDF document text
    • http://files.travelclubfc.com/uploads/1/3/1/6/131636855/revebeviwaduza-sovuware.pdfIn PDF document text
    • http://sekoxali.geekykinknewengland.com/uploads/1/3/1/4/131452883/kiwewokeferufodiwok.pdfIn PDF document text
    • http://files.adventuresav.com/uploads/1/3/1/4/131453215/6070745.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/1/0429/0913/9111/files/basic_knowledge_of_java_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/pijidolozisepidabivot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0877/6600/files/92073413632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5986/1909/files/27719246987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/fapesosegutupenekivovore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/tasexigaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/34218101708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/lepumogaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/57650291473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/50898856354.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_off000087da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DA 5164 bytes
SHA-256: 10968fc0df91922a46371ce2a14ae13b4a403ffe72266f10ee722e1813f27bd1
font_01_sfnt_off00009946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9946 10076 bytes
SHA-256: 8aad7933c416b3139a345a03d2a6d3f1773ff85e388ccf4798555b12ebc48b44

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