Malicious PDF — malware analysis report

Static analysis result for SHA-256 600ef3baf1c46262…

MALICIOUS

PDF

90.3 KB Created: 2020-12-27 13:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ff9cbc074002287ce1b4dd6365bf3c44 SHA-1: ed019eb6f78e14754bb647494b2ec33796587099 SHA-256: 600ef3baf1c462622047a75ba16e30ec68dc0338a6d5eb41283ba58bd9e635d3
154 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 indicating it links to known malicious redirector infrastructure, specifically the URL https://gettraff.ru/123?utm_term=ggplot2+scale_fill_manual+not+working. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest a phishing or redirection attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=ggplot2+scale_fill_manual+not+working In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444092/normal_5fdea150c851c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388426/normal_5fb7b9dba486c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412391/normal_5fbee6f079487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f9107e3a1b36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381091/normal_5fe55f987be4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5fb56cb0b6136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fb2c49fd7e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa27e2a93533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f9c9da696b6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/119432ca-e18d-461f-8610-b78ec067aec5/50th_law.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/common_core_4th_grade_math_division_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/ios_guidelines_action_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/67546130107.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/makalah_bani_abbasiyah.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012eeb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12EEB 25516 bytes
SHA-256: 44d5f7fd768a12a17d687b23558ee6260ecd22b3fca40a275b671a1236680660
font_00_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 5684 bytes
SHA-256: 0f4a83f5c1614b352470d2794cb1b3be05002c120a9765feb3bef87711a453bf
font_01_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 11964 bytes
SHA-256: 638113451efb2049d5ef1094ebb1988755b6b65ee19d31786c49abe7158da1f1

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