Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f0304a1e914c6f…

MALICIOUS

PDF

79.2 KB Created: 2020-12-04 02:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3a669764be9ae9cf9ee3b11a3f308058 SHA-1: 5866bd250a04727dee7eeb78e21e07628daec5a7 SHA-256: 71f0304a1e914c6f9aa4ca421ad6e9c7b90cda2c2ef799bf777fa3633c9af460
154 Risk Score

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. The embedded URL, 'https://ggtraff.ru/123?utm_term=las+ranas+tambi%25C3%25A9n+se+enamoran+libro+pdf', is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=las+ranas+tambi%25C3%25A9n+se+enamoran+libro+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fa83234b18af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_5f971675e53f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f8e706d37276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_5fc04eb57c482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446029/normal_5f9dadc974317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8edd4177ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5fa77e6f69822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421782/normal_5fadc2658ac99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dezajok/jupasekigudurewasosizizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde0ba7a-cadc-4eb4-a4f7-07b9d91519ba/24644982378.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/bleacher_report_live_stream_tiger_vs_phil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/614cd7a8-b611-4ba7-8b2a-ae2fa9da6974/tidebodupetig.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/afghan_kush_grow_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b261faf3-307c-4cbd-8594-c84fea6180fd/maxebibedeguwabejesiwaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6ef0d5-8287-4c68-9469-96153e49ea21/lorozuzenav.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 5412 bytes
SHA-256: 9a3c6f97d3fb45d9304710516f4a4e313c394f8e790fbf8d5b512621758feb01
font_01_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 11436 bytes
SHA-256: 9eaa88a6c3de6450b29c4ef2ee052efae0dbb25eb8777e25649664f75217558e
font_02_sfnt_off0001163a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 17012 bytes
SHA-256: 96ca149166080b724646806893a89ded94c3c0b01c9b37d49139b8fa466751a9

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