Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb066f539fe3fce…

MALICIOUS

PDF

42.8 KB Created: 2020-08-22 10:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9de688cfe6c3d61b0b447da4ca76285a SHA-1: ff2cd0fea594ff1bdb6ff2e5a95986c5fe7c7795 SHA-256: cbb066f539fe3fce7326df99ce19a70e55c1b195fecd8a41003f7fd5845567d8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a business English book, aiming to trick users into clicking the malicious URL. The presence of a link farm further supports the malicious intent of redirecting users to potentially harmful content.

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.cc/pify?keyword=intelligent+business+english+book In PDF document text
    • http://files.artcreate.org/uploads/1/3/1/4/131438188/7db26f5c97012a.pdfIn PDF document text
    • http://files.lightenlifewellness.com/uploads/1/3/1/3/131379183/6184693.pdfIn PDF document text
    • http://files.coastal-curators.com/uploads/1/3/1/8/131856125/f895a814463e.pdfIn PDF document text
    • http://febotojuv.wanderingrae.com/uploads/1/3/0/8/130814328/2629034.pdfIn PDF document text
    • http://kotapeg.melgough.com/uploads/1/3/0/7/130776046/3e354348046.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/1/0434/3991/5164/files/17527153356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/jardines_colgantes_de_babilonia_historia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/73333257011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/32243086414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/88182432176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/38647523307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/absorption_and_marginal_costing_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/ritububafaruzibotoxepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5566/7605/files/traditions_and_encounters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2827/3562/files/70846109395.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_off000069fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 4784 bytes
SHA-256: 845af90bd843ad88b9596a1d31643376d5437ec2c6781a3f22077794113c0d27
font_01_sfnt_off00007a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 10548 bytes
SHA-256: 2bb9d94b89812a8beeca43085aa1e3ef05bf43393090610a34ad220dad0689fb

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