Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec1f84a57c795c2…

MALICIOUS

PDF

47.3 KB Created: 2020-08-03 04:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15cbde304884a611c6c34b8a4a5bbc6b SHA-1: e4430425422611a52383907942bb34810130833d SHA-256: 5ec1f84a57c795c2db5edde90ce03d14f0da47cc1caf8b219fc45f4788cc6f08
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=cards+game+king'. The document body, though heavily obfuscated, contains this URL and references to 'cards game king', suggesting a lure. The presence of many PDF links points to a link farm strategy, likely to obscure the malicious redirector. The ML classifier strongly indicates maliciousness.

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=cards+game+king In PDF document text
    • http://files.msokeeffesclass.com/uploads/1/3/2/6/132682528/aadd2e15b12.pdfIn PDF document text
    • http://files.ckrobotics.com/uploads/1/3/1/4/131453843/3123105.pdfIn PDF document text
    • http://files.authenticlondontours.com/uploads/1/3/0/8/130814063/xuburitowejag_lififixuxeg_vipika.pdfIn PDF document text
    • http://wapasugan.dynamicvoicetraining.com/uploads/1/3/2/6/132681579/wipajibutetor-pezubopuvaf.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/1/0431/1190/7488/files/60025358105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/tezepor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1313/5774/files/jetosanukuzur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/67084606007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/49748172009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0699/2289/files/13546600592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/6379923405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3108/1639/files/java_script_go_back.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/tv_guide_seattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0304/3230/files/18347509930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/dujenagemikiparoribivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5817/3854/files/extract_vmdk_from_ova.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 3

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_off000075a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 5084 bytes
SHA-256: 890103a91f05b6386ca2bcb0b4d593377c5f91db07b6ef435cdd13edbe61dfef
font_01_sfnt_off000086d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D9 13152 bytes
SHA-256: 5b0d36025f9cbf02a658c040410348560b092f9fa8c14dfbf5c4624b2b59ba94

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