Malicious PDF — malware analysis report

Static analysis result for SHA-256 c455bc4a1b650756…

MALICIOUS

PDF

33.0 KB Created: 2020-08-28 01:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90e435ce800ff178cf568af33999dbe8 SHA-1: 128a030470f65cc8af5e6e9a7589f21549007b42 SHA-256: c455bc4a1b6507563271631f1c2d470e713ea7b4439367ea8a26b177a5ccfbb0
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate academic or popular content, but the primary link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and references to sheet music, indicating a lure. The heuristic firings confirm the presence of a malicious redirector and a link farm, suggesting the PDF's purpose is to drive traffic to malicious 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.me/pify?keyword=gladiator+theme+sheet+music+violin In PDF document text
    • http://files.coregenicconstruction.co.uk/uploads/1/3/2/6/132682892/limokivofegu.pdfIn PDF document text
    • http://tejur.sghock.com/uploads/1/3/2/3/132302868/3436268.pdfIn PDF document text
    • http://nozoxuja.fhacaurora.org/uploads/1/3/0/9/130969060/8531867.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/1/0432/3514/7933/files/lehninger_principles_of_biochemistry_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/psn_error_ws_37397_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/podufa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0631/files/brock_lesnar_workout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/garoxafadebevevoxikuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/68494998493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/581871399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6030/5560/files/offer_letter_acceptance_mail_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/35216100191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/burned_karen_marie_moning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/87244039664.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_off00004308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4308 5268 bytes
SHA-256: e5bd20ff78ece1e947078efa1200af343b19602f45920db56b1166147ab5e1ed
font_01_sfnt_off000054da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54DA 10012 bytes
SHA-256: aba383b8232c39d0611045c24934ebf719cdbb4efad24a35e7fefd6fcb6f84af

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