Malicious PDF — malware analysis report

Static analysis result for SHA-256 8301910e09d08ec7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 19:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f01947bda77b129893bf5bcba6c80be SHA-1: 854828bdc0b4127d1831c4d957e242e04268d805 SHA-256: 8301910e09d08ec731f94208b86eec3776d44a3e01888d321ac85079ee5109fa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Kenexa prove it excel answers', a common tactic for phishing or spam campaigns. The presence of multiple Shopify-hosted PDF links suggests a link farm intended to boost SEO for the redirector.

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=kenexa+prove+it+excel+answers In PDF document text
    • http://files.manitobarugbyhalloffame.com/uploads/1/3/1/1/131164281/6e2319b.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/1/0432/2669/3789/files/vaxosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/libro_aprender_portugues_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/boravujuxevepixosopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/48172260850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1046/files/33294999802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/sosubidozokufatawisasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/calendario_lunare_semina_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/2596259715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gozigasulozalol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/tratamiento_nutricional_para_artritis_reumatoide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/dorivipuwozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 5116 bytes
SHA-256: cbf61b66075ef455692dc494f7a5b5e75cd8f24c6e7e6e0d2501bd4ae7e599fe
font_01_sfnt_off00007584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 10104 bytes
SHA-256: 92105ab5e44a1e134e65f30159072f9dbc4465b770187e7dd25d816a8de9bc25

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