Malicious PDF — malware analysis report

Static analysis result for SHA-256 55babf94286b773e…

MALICIOUS

PDF

87.6 KB Created: 2020-12-17 21:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3cec92ebf7acc4ab8ecf98adc6663862 SHA-1: 93024707f6fa4b4e8dac3b1cd512383f73a6627f SHA-256: 55babf94286b773eff64bb8a157f749520f059ca7c0ac676f2be9ae12184f2a5
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although the document body is heavily obfuscated, the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/123?utm_term=newsies+songs+broadway In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f8e2b66c3b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5f9a02bda9af7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5fd8e73cb9fdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf54c7acac6192a85f8a8/1606284628669/45721432327.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/alabama_football_schedule_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/wheel_of_fortune_puzzle_pop_app.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/ice_sheet_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/ludaweru.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/washington_huskies_football_recruiting_bleacher_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87d423f-901f-4360-ae70-9d71b2261944/5371455142.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 5264 bytes
SHA-256: 75b39152ce6c52acfac6119f84e68a26b31029a4aee1ab62b34d740ea147f205
font_01_sfnt_off00012ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE1 11908 bytes
SHA-256: cebf4a38842f27aaf3fb4275418c5e1a02378a1fb0259643510214c9c400a22f

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