Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c201c3b62a92d9e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-11 21:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ecdf1f16423eb67a5f48a6803119710 SHA-1: 99d6b30214814a2dff93025b1d97c6e575aa871a SHA-256: 4c201c3b62a92d9eff77fa9b5f338a11fee79c28e5fd3eb281af756c9c75b409
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, which is known malicious infrastructure. The document body text also contains the same lure and URL, suggesting the primary goal is to trick the user into clicking the malicious link. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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.com/wb?keyword=converter%20pdf%20to%20excel%20free%20download%20full%20version In PDF document text
    • http://files.thaiyogajen.com/uploads/1/3/2/6/132681836/5472477.pdfIn PDF document text
    • http://files.turncardiojamstudio.com/uploads/1/3/1/6/131606408/7679c3bf.pdfIn PDF document text
    • http://files.messytech.com/uploads/1/3/1/8/131856012/20fc4c9840.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/1/0434/4496/1442/files/19831080607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/7449852734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/88332611438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/wudenosot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/using_financial_accounting_information_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/bopuzinupujabivipukizepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/66249260045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/47909212225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/30254973874.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_off00006890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 5276 bytes
SHA-256: e87fcee198df3d64f18c4d1bb472974e3b841ac1f872ba9ce6424765b8b49b8e
font_01_sfnt_off00007aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA5 10168 bytes
SHA-256: 0cee2025895886b081c5a036f16ad7801b36c63e12d246eae5857106dbe70170

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