Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21e133cca7967e3…

MALICIOUS

PDF

51.1 KB Created: 2020-08-16 22:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 154272e67ca1a35b6e29a3d45db6fa34 SHA-1: 4f94f8a04e1c7972ae8cf065384c174b65a99156 SHA-256: d21e133cca7967e3ef9f7220ab0fa9a40b100132a4c2367b640cc68e588bc4db
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=maths+probability+worksheets+gcse', likely leads to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=maths+probability+worksheets+gcse In PDF document text
    • http://files.ashleighlleiter.com/uploads/1/3/1/4/131483830/f399f410886.pdfIn PDF document text
    • http://files.megageniussupplystore.org/uploads/1/3/1/4/131408439/b99104af99.pdfIn PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/xilitadifijobixotok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2309/3147/files/icp_product_registration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7798/8505/files/organic_livestock_farming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/l2_network_engineer_roles_and_responsibilities.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/1376/3235/files/cellular_biophysics_transport.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/2015_chevrolet_camaro_v6_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/koxazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/gisomekixez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/karma_conf_js.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_off00007af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF9 5280 bytes
SHA-256: 5b53a3121165862c8405f3b7577c0bda3fd810cd0561c97e7b9749e5bcc6f07b
font_01_sfnt_off00008d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1E 10728 bytes
SHA-256: 9a72b7ce5c8ba80f08a672b894c90965b05c086c80e6498f115c572a8c9a7614
font_02_sfnt_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.