Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0bda24b8fa17fd…

MALICIOUS

PDF

40.2 KB Created: 2020-08-10 01:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e7139dc4afa03f8372a5b0086cab4d3 SHA-1: bbcc20a656064714a594e552d0174807b73ecf3f SHA-256: bf0bda24b8fa17fd4a77c3c6fce1a929c13106e43bbc1edbbec87d65d0365577
202 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=biomechanics+of+sport+and+exercise+pdf, which is likely the primary malicious payload delivery mechanism. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=biomechanics+of+sport+and+exercise+pdf In PDF document text
    • http://files.evolvetogetherpdx.com/uploads/1/3/0/7/130776344/0a782a23e8ec9.pdfIn PDF document text
    • http://files.ericmccarron.com/uploads/1/3/1/1/131163736/5150701.pdfIn PDF document text
    • http://files.lighterthanairky.com/uploads/1/3/1/8/131856234/173fb3d27.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/1/0428/0962/2687/files/897830086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/87803729637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/tukege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/best_practice_book_for_ielts_writing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2286/8892/files/different_types_of_false_ceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/emotional_intelligence_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0115/9575/files/calendario_de_vacinas_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/fanonatopifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/sozev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/future_authoring_program_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3069/1496/files/zobiraxotaguza.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 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_off00005f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5480 bytes
SHA-256: 3f1191606b8ec2282e51092ceee3abcffa8777d10d0c9792c49284f7b6d7d3f5
font_01_sfnt_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 9896 bytes
SHA-256: 2fabe78c0d514a7c26e363a4597d21a4801eff6aa1b01145ebfa158beee982da

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