Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb99c8662ad210d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-04 21:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d23124d21537c890ea98c7aee7a85c61 SHA-1: 38bd400550a7045b2cde8f9aa00df2797cbfa998 SHA-256: bcb99c8662ad210d4465fa00b3c5c3c77831248822eacafa0f710a36182e64a8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as a free book download. The primary redirector URL is identified as malicious infrastructure. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt.

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.cc/pify?keyword=kiran+psychological+aptitude+test+book+pdf+free+download In PDF document text
    • http://files.rogerckellygroup.com/uploads/1/3/0/9/130969686/gozurazonud.pdfIn PDF document text
    • http://files.freshrescue.com/uploads/1/3/1/3/131398357/2325814.pdfIn PDF document text
    • http://files.curriculumdevelopmentunit.com/uploads/1/3/2/6/132682663/loguzove-takidage-demisetiwuwob.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/1/0433/1690/4104/files/40548943739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/xaxetaxeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/xebefatokebedobabufive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/60588720698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/lugoxomijotopez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/8082996413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/jikobowinebabix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/46884106966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7348/files/mowideloxozufijobisamofun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/66365682414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/penyebab_parestesia_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/79931992559.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5814 5784 bytes
SHA-256: 70b0da892e3407dfcfaf31606c34b7aad307a386b0895d6e9ba49cfbe0b00d92
font_01_sfnt_off00006bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 2116 bytes
SHA-256: 33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
font_02_sfnt_off00007594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7594 15400 bytes
SHA-256: 21eb61241f602bafff497be39afbc4b7df4bb758948f40d021dc58cb01a08b50

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