Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b8a74ab5085e63…

MALICIOUS

PDF

37.7 KB Created: 2020-08-22 04:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0aa43fecdff357476d8a2ba45035cd09 SHA-1: 3c32ccec45a96786724ff41cc15102d8f129eec8 SHA-256: f8b8a74ab5085e63fa5b6dd2acc234d1cda1bf07ff3047b61e8aed4691bb30d6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link to 'ttraff.com', which is likely used to host malicious content or redirect to phishing sites. Additionally, a large number of embedded links to external PDFs were detected, suggesting an SEO link farm or a method to distribute further malicious payloads. 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=%25C3%25A7engel+transferencia+de+calor+pdf In PDF document text
    • http://tituzobo.sharimycek.com/uploads/1/3/1/3/131384260/83665d4.pdfIn PDF document text
    • http://kawube.chevron.ie/uploads/1/3/0/7/130776021/joduvu_vubumufixaf.pdfIn PDF document text
    • http://zaxurulug.khfreeman.com/uploads/1/3/0/7/130775732/5998641.pdfIn PDF document text
    • http://movap.stop-pressing-snooze.com/uploads/1/3/0/7/130739232/desuluwovaxov-mijujozadapawo.pdfIn PDF document text
    • http://nesegaxo.randymcmusic.com/uploads/1/3/1/6/131606069/1448390.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/1/0431/5011/4967/files/16685398317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/73473072012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/93088482264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/all_bearing_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/15368193004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/basodopadiwine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/sinusitis_kronik_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pufabupenidobuxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/adh_and_aldosterone_perform_opposite_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/shrine_of_amana_map.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 3

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_off00004d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D29 5416 bytes
SHA-256: 73c453cce328da96000033b29192a86ad6e4e1596988bbc7fcaa7aada5b99d04
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 13128 bytes
SHA-256: f78e2f2d24fb5c8d7db100409ba83f484c4cee7f7c0d840a88a78639afac90ab

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