Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce73cf4ecb0afc51…

MALICIOUS

PDF

41.0 KB Created: 2020-08-08 13:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d6e6c450a9aae969f0546faa473b3d9 SHA-1: 975fdcc67a8fcb08fffb8a18b2c18b43e81c549b SHA-256: ce73cf4ecb0afc51a0642d518702873aa9a1da07e5aea857b2d133e0e03f3770
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to improve search engine ranking for malicious content. One critical heuristic firing indicates that these links ultimately redirect to a known malicious URL (https://ttraff.com/pify?keyword=makalah+schistosoma+japonicum+pdf). This suggests the document's primary purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=makalah+schistosoma+japonicum+pdf In PDF document text
    • http://files.dthomastraining.com/uploads/1/3/1/0/131070152/nejuwupovonenif.pdfIn PDF document text
    • http://files.triarchypress.net/uploads/1/3/2/6/132695467/pixavefotoda.pdfIn PDF document text
    • http://files.mrwhitcher.com/uploads/1/3/1/3/131378852/332f69ca69a2.pdfIn PDF document text
    • http://sadadomi.mesheracapital.com/uploads/1/3/1/8/131858661/f1ef65be3ec1a9d.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/1/0445/3092/5727/files/atualidades_para_concurso_em.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/financial_risk_management_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/gapojop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/woralilivan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/49104773440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/39205391046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/ponezexadutomim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/41649957373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/fundamentals_of_anesthesia_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/bedixizewibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6235/8179/files/introduction_statistical_learning.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
🗂 Part of campaign: dthomastraining.com 3 samples

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_off000062f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 5444 bytes
SHA-256: af1673b03b7a646790b9796a5a38691a7fd4f666395004feb3ba52512f76644d
font_01_sfnt_off00007563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 9832 bytes
SHA-256: 6dd7dda15342323b648948f7f10b536bb2285fe04c9fa940ea77b9768370e94a

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