Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8cbc4dc989719ff…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 955d6f37a022b0a01305e56c1f4821e3 SHA-1: 9d122291370f2772aca8caf57ac6a694a6efbdaf SHA-256: d8cbc4dc989719ffaeed1d26913d8a5f16fa203650a43a3bee3384dbdf9d274f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Pokemon silver guide pdf', suggesting a social engineering pretext. The presence of multiple Shopify URLs, some confirmed benign and others unknown, indicates a link farm strategy, likely to obscure the malicious 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=pokemon+silver+guide+pdf In PDF document text
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdfIn PDF document text
    • http://files.rubbosaltshop.com/uploads/1/3/2/6/132682585/jetafajedidodid_bevidotedajeki_nalisitaw_tekajelejezul.pdfIn PDF document text
    • http://files.siblingarts.net/uploads/1/3/1/3/131382590/9606010.pdfIn PDF document text
    • http://files.victoriarefinishing.com/uploads/1/3/2/7/132740978/bbfac67.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/1/0430/9378/6791/files/xebonivedob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/16526608555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/accounting_information_system_lecture_notes_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/84061371955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/wowagosubeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/vuzaviminubagobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/bagezujibulonot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6560/5286/files/p90x2_fitness_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/nebopaxojosagabaful.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/2931617258.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 8

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_off00006f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 5276 bytes
SHA-256: b857b99b4c9eaea3e43e95c12a751998deef580686e5f4922af39e64cae4d359
font_01_sfnt_off0000814b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814B 10420 bytes
SHA-256: c5b881b84e1e977205a192d607a2ad58577945599e968a0f4994793525e35559

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