Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c6d2f8bcf654a1…

MALICIOUS

PDF

72.1 KB Created: 2020-12-17 17:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 988078dd82ef567b13f4e7e2b5e60378 SHA-1: 92c52e2cf54d23eb3e571d3a58083734030b9244 SHA-256: 70c6d2f8bcf654a1132490240c80651b417b5836c1fee06aaf9c8851b4acd3a5
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 critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=alpha+phi+gamma+unlv'. This URL is also flagged as a high-severity SEO redirector, indicating a phishing or malware distribution lure. The ML classifier also strongly suggests maliciousness. While no scripts were extracted, the presence of a malicious redirector is sufficient to infer a phishing or malware delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=alpha+phi+gamma+unlv In PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fcbdf997c591.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5f92c8299a710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5fb8be8449d79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcb4b3c6e4b9.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/5fc50ffd084698658e791314/t/5fcc8f3805ddc9599d1bcb2b/1607241528746/madness_combat_project_nexus_controls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5eb64e98326c02082010/1606377143206/everstar_air_conditioner_model_mpm-08cr-bb4.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/51440896109.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2459c190381d6d646dbe/t/5fd5fbb1267c8d0ace3bd505/1607859127076/medical_interview_questions_and_answers_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fc6633a18e72e5fdbb26cce/1606837050596/31843242956.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1210ec89e1c4b8fbfc3b6/t/5fc359d6e18c5c478e6637e6/1606638039258/pesufa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57f93df132613bbdcadde/t/5fcd18ec978da30c560385d9/1607276780731/alpha_squadron_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/zudotefipud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31C 2888 bytes
SHA-256: 4861b00640365d7b9e6e081e6da95684514ab4325a6e54de136cbf0ae6afde2c
font_01_sfnt_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 5008 bytes
SHA-256: 0f31d6a111dc30b5f89201050476b8e9a72ca63df4130574f56ca87fe2724293
font_02_sfnt_off0000ee4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 10400 bytes
SHA-256: 9fc9fa59d350fe7af91a14b56da218bacbf609dbcb254808894230b6bac5a3f1

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