Malicious PDF — malware analysis report

Static analysis result for SHA-256 289d6fac79c673d8…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 06:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 16cb61c976087babb5a317bf6c199987 SHA-1: bea2704eb7b78670aa22dc1ec52634a2a13b3f4e SHA-256: 289d6fac79c673d8ba67517302e0d558faba3b2ad0687b84a8abd7f02ccc0f03
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=critical+characteristics+of+information+pdf In PDF document text
    • http://vipefa.catrinastiller.com/uploads/1/3/1/3/131398455/8703575.pdfIn PDF document text
    • http://files.greenvalleyroastingcompany.com/uploads/1/3/2/6/132681479/49963a61f19fb1.pdfIn PDF document text
    • http://files.pgoody.com/uploads/1/3/0/7/130776225/lofisakigozuk.pdfIn PDF document text
    • http://files.witnessrodeoco.com/uploads/1/3/1/8/131871979/2768467.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/1/0432/4445/4051/files/nejizelinero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/58293991413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/83025773448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/42862862729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/blue_circle_emoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/vesesafema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/ms_office_2010_activator_keygen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/34082776004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/xawolewidil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/74491340717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/60573694671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/5e_monsters_by_cr.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_off00007650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7650 5300 bytes
SHA-256: bee7dc8d24101dee3971b7b68a955734db508b6c30dd1dcf4fb70c430e90da45
font_01_sfnt_off00008824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8824 9964 bytes
SHA-256: 708289bf15b5d5e1b853fe58822dd57a3ba6bcff0743219afa6b50d44b0ac9cd

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