Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd77c59f252ac59…

MALICIOUS

PDF

43.7 KB Created: 2020-09-12 23:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48c9a57c17b5dc6980b388617314d0dc SHA-1: dcb7e49326f927f39ec0f6b941c6f767732c2bb0 SHA-256: cfd77c59f252ac594696dc494cad109c314fdcfeed83b9bdebd4752d7a3974a2
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.link/pify?keyword=kinh+l%25E1%25BA%25A1y+cha+pdf`. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning tactic to increase visibility and traffic to malicious destinations. No scripts were extracted from this sample.

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.link/pify?keyword=kinh+l%25E1%25BA%25A1y+cha+pdf In PDF document text
    • http://kavate.dbvisualartistseries.com/uploads/1/3/1/3/131382470/3454902.pdfIn PDF document text
    • http://bogewig.sustainableseacoast.org/uploads/1/3/1/4/131453674/6774223.pdfIn PDF document text
    • http://files.mschwindtphotography.com/uploads/1/3/1/4/131407734/da5aec.pdfIn PDF document text
    • http://files.israquakids.com/uploads/1/3/1/8/131871466/nuvituluni.pdfIn PDF document text
    • http://pejeliv.edwardellsberg.com/uploads/1/3/2/7/132710780/2479693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/90661f_ecc7bea5cf9f41a9a1f945fa5ba6f85e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1479de_a0e29e1a6ffe4d27b867f229034aa79a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d089b_3c6dea0431a74943a69a0b0aa8d1a034.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b5f63_9d50cf8ce9a04dec9b38de6460285f7a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b42fd6_a0a9ecfe24f14528a95529619bd903ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b91392_f7f4481b04ec49c8b9ced97d2d7b8893.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 4

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_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 5264 bytes
SHA-256: 63ad95c7575eec7b1787a6d3ba2e7da1e0b0d3098ed3c2fd268147f92774d490
font_01_sfnt_off0000712c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 21396 bytes
SHA-256: 17942cd13c33ebe615508c52ba8f2ff59ea83569b1ac2ab58d5d1c668cf4e3a3

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