Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffb3f2fb1f49d7a…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 11:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfca41b00924f4fced5644ddd8c32162 SHA-1: e82297fdc42dad6faac06b57b834484c4b3a4f1d SHA-256: 4ffb3f2fb1f49d7afffaea525889c98be4344435b1bff0cab591057eb8e2fca6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure like 'ttraff.com'. This suggests the document is part of an SEO link farm designed to lure users to potentially malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern involves redirecting users via embedded links.

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=balancing+equations+worksheet+year+10 In PDF document text
    • http://files.aldadesigntech.co.uk/uploads/1/3/2/7/132741211/2126513.pdfIn PDF document text
    • http://files.bulgarianoverseasproperty.com/uploads/1/3/0/7/130776720/wiwafavusil-jajejumivul-pitetenofu.pdfIn PDF document text
    • http://files.stellarcarevacations.com/uploads/1/3/2/7/132741109/5032976.pdfIn PDF document text
    • http://files.isnaa.com/uploads/1/3/0/7/130775220/5df2d20ba1fc9.pdfIn PDF document text
    • http://fopuf.imperiacateringjakarta.com/uploads/1/3/1/8/131855981/ba107f99c6b3029.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/1/0431/1423/4016/files/kopujapamuvinimatuzoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/92433827025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/80902633538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/nilidipelod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/xafulawifazosiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/thrust_ball_bearing_size_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/brighton_college_abu_dhabi_uniform_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/da_form_1256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/82130653734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/pupuwajajabirobavixovebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/bapozukevob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/xifoveza.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 7

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_off000069b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 5688 bytes
SHA-256: bec02b48b713159ecc243c76cc906df954f4acdd7f73ac8fa0537dda0be95315
font_01_sfnt_off00007d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 9804 bytes
SHA-256: fab9211dac79ae552ed47967c79b0ade0e8f3ff936170ca8488ba7705f62b8e2

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