Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e5dd3efff0f7fe…

MALICIOUS

PDF

41.6 KB Created: 2020-08-16 20:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e90d91ffa8e0bc92ebf93b7488e095ea SHA-1: 00647922c7a52f04d3baab95b942f2ac80e8c8ae SHA-256: b5e5dd3efff0f7fe67c620f6bd8e654765af9e7bdb8cb963fe19496a931358d2
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=multiplying+and+dividing+mixed+fractions+worksheets+pdf'. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that matches the redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=multiplying+and+dividing+mixed+fractions+worksheets+pdf In PDF document text
    • http://kujuse.taybankglass.com/uploads/1/3/2/7/132710797/7787928.pdfIn PDF document text
    • http://files.stephaniemarceau.com/uploads/1/3/2/8/132814306/dawesu-jonulofuwijoz-notininav.pdfIn PDF document text
    • http://files.bitstutorial.com/uploads/1/3/0/8/130874539/388675.pdfIn PDF document text
    • http://fazaxine.limousinesinaustin.com/uploads/1/3/2/3/132303035/74d7b5975f.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/1/0435/8130/9085/files/poultry_production_in_the_tropics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/difubagogejodebulov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1790/7874/files/ejercicios_resueltos_de_centro_de_gravedad_y_centroide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5363/7018/files/90084197558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/audiometria_otorrinolaringologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/zubewakuvidesokivimomirug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/38171336431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9766/9278/files/31862967635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/zipureduniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/33400380167.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 6

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_off000064a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 5960 bytes
SHA-256: 6faa779c3af20d7256cf440f7550885563c6c5e853ddbdddc074aafccc48db38
font_01_sfnt_off000078e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E6 9412 bytes
SHA-256: bcc7b11e556164e8c22f5903f4effe0d01ebe2c361e08521d781d5168f5abf32

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