Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f26a759994e486…

MALICIOUS

PDF

54.9 KB Created: 2020-08-03 01:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b15a311c7725f7da6037028ff1809f3d SHA-1: b9768e2d6af046e1715befc31d33ab0b85433251 SHA-256: 56f26a759994e48613ffb83c2fb838585dfb7c51204e596753c994d47b7cfdbd
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which are part of a link farm designed to improve search engine rankings. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is disguised as a link to a calculus textbook PDF. This suggests a social engineering attempt to trick users into visiting a malicious site. The ML classifier also strongly indicated 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.com/pify?keyword=essential+calculus+early+transcendentals+1st+edition+pdf In PDF document text
    • http://files.mrsolden.com/uploads/1/3/2/6/132682684/9800698.pdfIn PDF document text
    • http://files.silverstatemustangs.org/uploads/1/3/1/3/131378776/nerebimem-susuw-bonunonuzinod-visigusin.pdfIn PDF document text
    • http://files.iwanttobeanengineer.com.au/uploads/1/3/1/3/131380305/pobudegataxuwe.pdfIn PDF document text
    • http://files.stillnessinmovement.com/uploads/1/3/1/4/131453255/witofurelonesan.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/1/0427/4031/8375/files/85606177453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/1031048500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/nitofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/82241322764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/24771718342.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/pevivup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/depomoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/64902491146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/dozidivipujet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/fidalinegubomekatow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/tosudofewakonototakixum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/52179539758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/rurogofuzuxaluwedidivofez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706In 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_off00008dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC0 5260 bytes
SHA-256: 5f5c62f36e79d8bca4ef089172dc2a4fa17826c9059cc99c75a14b6fef416ad0
font_01_sfnt_off00009fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC2 14916 bytes
SHA-256: 7c50185e10e727a63ea20edfcbb5fba3b961812bdfcd4c49fd465c635b886fcc

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