Malicious PDF — malware analysis report

Static analysis result for SHA-256 defd4cf38c05c00b…

MALICIOUS

PDF

62.6 KB Created: 2020-08-09 03:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d8d17f0acceaca85f9a847e033f9629 SHA-1: 660178ab455b3c430eb4ff129f3e81f6b24d3a20 SHA-256: defd4cf38c05c00b46b7ff2d4935898ffee52e55a918f780d2aa08f4acd5bff1
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=3+buffer+systems+in+the+body+pdf', is designed to redirect users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting a malicious intent to drive traffic to potentially harmful sites.

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=3+buffer+systems+in+the+body+pdf In PDF document text
    • http://files.elbcc.org/uploads/1/3/1/0/131071167/lujometezu-pozori-wokopipu-razufunebuwe.pdfIn PDF document text
    • http://files.toddconover.com/uploads/1/3/0/9/130969944/vegeguwasasimif.pdfIn PDF document text
    • http://rozaran.howtobeastrongwoman.com/uploads/1/3/2/6/132681579/lupili_niwejab_wotezi_sijub.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/1/0433/6576/1176/files/asterix_en_italia_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/karuvonexiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/52881043140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3838/1992/files/75211832157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/lujoxozosatulosugewodaman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/concepts_of_algorithm_flowchart_and_c_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0954/3077/files/warhammer_40k_codex_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/16430549238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/bepokoxeziwazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/38752455323.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 2

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_off0000b732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB732 5348 bytes
SHA-256: 883b9961f663780b10bd6ff17ba0365ac56233eccc34156b3ddb708723b7f792
font_01_sfnt_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 10572 bytes
SHA-256: 71788b217b2b83b583e8a8efb098fd4b9d3c237e3824b0abe1988fd35a320cdd

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