Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2ffe6534312570…

MALICIOUS

PDF

80.1 KB Created: 2020-12-22 16:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d7832e2140666d43ff355de7974f478b SHA-1: 99be2cb609d1e7e4edcebcaf570fb71d61f4993a SHA-256: 4d2ffe6534312570a4302bc46d9b71b77cb6c89f2c8f709eb6500fcaa883db8d
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/strik?utm_term=home+design+3d+freemium+para+pc. This, combined with a high ML classifier score and ClamAV detection, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://gettraff.ru/strik?utm_term=home+design+3d+freemium+para+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_5fdb72d803a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5fd7a36a73519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8c50743ef3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f9b2ca419631.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fc49908d878d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5f884d37c8c5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5fc61045324fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5fb92a0c85244.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/5fc5dc505bcb0228a2a48d66/t/5fc6acd44f98375720cbcc48/1606855893114/jagiwukiwodebibizir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77087f4-c770-4eb3-b75c-e3e87fba4d79/f5_101_exam_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc3385761e25426e1a096ee/1606629464557/dezuvotep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a9b758762305c0f9f2b4/t/5fd137d8315bb05617641eb5/1607546840199/tidufisumesizogoxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e9aa82-a15e-4dd0-8a48-24a241ec1016/george_donaldson_daughter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf4895db6f322e656e3e16/t/5fd69780e5ac5828962ad354/1607899009417/65817592855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f621176-cedc-489d-b907-15df47f7a34d/55130489478.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_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 5568 bytes
SHA-256: 7c5509b269d6ffddef2ae93e34f725a753b11d439291fd5891e54bf6534cfebc
font_01_sfnt_off00010d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D62 11156 bytes
SHA-256: 4c3c32813b5e3af9cbc4a9b92a151d8beacb8b5424d1b3b4f87cba6565a00df0

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