Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc00240c32f87dc…

MALICIOUS

PDF

145.5 KB Created: 2020-08-21 08:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8ac0631e208062ae21a30a6900f4b98 SHA-1: 29f96b47900ae2cbbcb09914e1535ae91b2c7498 SHA-256: 4cc00240c32f87dc46eb0502e3fa3fe02c2991e2812e4f9345bc40b4a7b022ac
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to redirect users to malicious sites. One prominent link, 'https://ttraff.ru/pify?keyword=cpr+guidelines+2015+american+heart+association', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Cpr guidelines 2015 american heart association', suggesting a lure to trick users into clicking the malicious link. The presence of multiple PDF links and the ML classifier's high confidence further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=cpr+guidelines+2015+american+heart+association In PDF document text
    • http://files.agefriendlybethel.org/uploads/1/3/2/6/132683005/7703249.pdfIn PDF document text
    • http://files.improbable-studios.com/uploads/1/3/1/4/131438571/1301854.pdfIn PDF document text
    • http://files.frameglaze.net/uploads/1/3/1/4/131453919/96fe50445f03073.pdfIn PDF document text
    • http://files.kyle-a-piat.com/uploads/1/3/1/8/131857465/b6a0e59a.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/1/0433/4170/9462/files/64476164254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/jufag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8407/8503/files/risk_analysis_in_software_engineering.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/87577025048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/24060647167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/fajadorelivudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9454/files/32526745564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/zoology_reference_books.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_off0001fba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBA8 5840 bytes
SHA-256: 8a292c5cf81ee47facb6e7ffe566e3450165e3644f5879ffc3578ba491472ffc
font_01_sfnt_off00020f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F62 12256 bytes
SHA-256: f892faa3c8ae08314a9fe4b0cd16907f8572b645d89dae325c6b47137f5f4d41

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