Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d983f50b11703e…

MALICIOUS

PDF

71.9 KB Created: 2020-12-26 22:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cd125cfd69a342f0399d3fe82da4ce9 SHA-1: ef2a136138f8ee169d56adbb6a36375d7a89fb5a SHA-256: 53d983f50b11703eee7c9bab5359e57f9592178520efd39d38393d6f80b833d7
154 Risk Score

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=luigi%2527s+kitchen+nightmares+still+open'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=luigi%2527s+kitchen+nightmares+still+open
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/kokefidedugeka.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/2c14934ac46c.pdf
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fd24ff532ac2.pdf
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/b588c1cf87ae27.pdf
    • https://cdn-cms.f-static.net/uploads/4483354/normal_5fae8ded33ff4.pdf
    • https://rupunapu.weebly.com/uploads/1/3/4/3/134354814/tilagosupapej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/xebareto/hot_yoga_pasadena_schedule.pdf
    • https://uploads.strikinglycdn.com/files/4a93e0ec-8c9f-4680-adc7-6bdaa923084a/halloweentown_ii_kalabars_revenge_google_drive.pdf
    • https://uploads.strikinglycdn.com/files/3dbc5dd8-1304-44e1-82aa-cf0293830893/keeper_of_the_lost_cities_exile_free.pdf
    • https://uploads.strikinglycdn.com/files/c5bc9974-bd20-4709-a6ff-434b5b650919/27552390925.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d02d.bin
1e257de5e8b9ccebbdab0993f27a8bde5f0b7170923b3996c5f4a6ff7228afa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD02D 5268 bytes
font_01_sfnt_off0000e1e7.bin
3d696a7c36ebab8c049d6b01ec507b878b8fd828acb32e5e301de089a06686f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 10132 bytes
font_02_sfnt_off000104a3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 4324 bytes