Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c9e6e13a6aa374…

MALICIOUS

PDF

33.4 KB Created: 2020-08-05 08:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15ba4ab803da82282d693af36fac48ca SHA-1: 40c3a0d431bbc36aa837a18253fa109fe28d14ff SHA-256: 81c9e6e13a6aa3748cde6354a117d2eb2f60216b06a7dd5cced3762e9db1af85
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, forming a link farm that redirects to a malicious URL (https://ttraff.com/pify?keyword=careless+whisper+tab+guitar+pdf). The ML classifier and heuristic firings strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to classify this as a malicious redirector.

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=careless+whisper+tab+guitar+pdf In PDF document text
    • http://poxaj.coxptsa.com/uploads/1/3/1/6/131606349/2033776.pdfIn PDF document text
    • http://files.athenscountystorage.com/uploads/1/3/1/4/131410812/fb11663c9.pdfIn PDF document text
    • http://files.futfemuniversal.com/uploads/1/3/2/6/132681156/4129992.pdfIn PDF document text
    • http://files.bwrys.com/uploads/1/3/0/7/130775245/3b7c117a9.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/1/0431/8507/8423/files/vepigovefozunijunari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/24982448672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/17503587140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/zokukevefijiwukedebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/52865378535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/27061542497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1161/0520/files/after_ever_happy_study_novels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69901941500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/vujezokidonowexesit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4415 5440 bytes
SHA-256: 58b754e71346ba4e460d1bd9844e0231f622c8d55539f961f65242fcbb8fcf00
font_01_sfnt_off00005697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5697 10072 bytes
SHA-256: cf19d2f42effa98de377c92e72c995c0a8c0d38e7c425ed259e8cff5d1438f6e

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