Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21a0fc3d6e5791d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 11:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71f491e3537cb01307de1f4a2d75f469 SHA-1: 71a25b9c038dc2ca6087f00e11eed7321b7aa59d SHA-256: d21a0fc3d6e5791deb172257c54d7f68cdb70cf75abbb1589455105c6b6c3fbb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=the+whole+brain+child+ebook'. This indicates a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to an ebook and the authoring application, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, often used to disguise malicious content.

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=the+whole+brain+child+ebook In PDF document text
    • http://files.worldheritageconsultant.com/uploads/1/3/1/6/131607943/4556d09887e08a9.pdfIn PDF document text
    • http://lobureb.hjbandboosters.com/uploads/1/3/0/7/130739456/345938.pdfIn PDF document text
    • http://files.niwawriters.net/uploads/1/3/1/8/131872107/2c2f0.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/1/0429/3004/5091/files/mice_and_mystics_lost_chapter_cat_s_cradle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/mathrubhumi_calendar_2017_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/jirejabexijereg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/voxazidepolorod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7338/9223/files/35287482025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/simple_present_tense_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/introduction_to_discrete_mathematics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/jeziwatusesigutojun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9970/0889/files/rajiwanube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/sheet_metal_gauge_conversion_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/76198749139.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_off00007397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 5092 bytes
SHA-256: 534115a24cfcadff54ab8d0adfed3cf86150047b8d07cbd5813aefa3f3058298
font_01_sfnt_off000084eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 10696 bytes
SHA-256: 9fc01d30f06022aa6c1108407fbbc88b693168e9b41a7185ccda262084416dcb

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