Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e6bf8d0e4408a5…

MALICIOUS

PDF

52.2 KB Created: 2020-07-31 12:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 127dd4726fb5e14273b6eb0d14e4260d SHA-1: 77170e4008d25e98159e1e2149f534dadb0f7542 SHA-256: 40e6bf8d0e4408a5a79f9d73bbdf5ce777fb476c6bc6c9671e34ba0bd71ab9a5
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, indicating the document's primary purpose is to redirect users to harmful sites. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of the file.

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.ru/pify?keyword=bodybuilding+exercise+schedule+pdf In PDF document text
    • http://files.donnaabbotthomes.com/uploads/1/3/1/8/131871537/78febf336.pdfIn PDF document text
    • http://files.wanteddoa.com/uploads/1/3/2/6/132681617/31c971957cd399.pdfIn PDF document text
    • http://files.drneuhaus.org/uploads/1/3/0/7/130776295/7d376e2aee27f52.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/1/0435/2580/0087/files/20016546290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4831/2736/files/wikidabuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9137/7828/files/96645978838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/mobesijedavogenixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/7515021105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1612/4576/files/66085751302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/lazufojozanuboraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/85490354636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/42301860321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/6559172198.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 3

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_off00008d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D87 5368 bytes
SHA-256: 9354dcfc0498300175ec743e119bea2ca8041809160bdf58ae08c05a6e0f6abb
font_01_sfnt_off00009fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC4 10448 bytes
SHA-256: 8ea9949d37c84b53e003e61fef16af3b88167aedb4c50c0a7ddb91fcf7161a76

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