Malicious PDF — malware analysis report

Static analysis result for SHA-256 55de2a9a0848e784…

MALICIOUS

PDF

66.7 KB Created: 2020-12-18 06:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 605454a14de24ffcee39421616b125a8 SHA-1: 529ce95b85490b055183a2690e2f39afa7d098e0 SHA-256: 55de2a9a0848e7848ebb35406872cd4091b0a0e23552a53e441cf820bdb3f7fc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, ggtraff.ru, which is disguised with a search query for a popular album download. This suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=dr+dre+compton+soundtrack+full+album+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_5fb59f8b4d674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5fac45ed06739.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/ca6fb2b0-298b-4f08-8e5f-8927635926f5/busavuvisiradizixukip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18716ab79f442f22e10f3/t/5fccdebb5177ea328cc190de/1607261883538/31541366970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd07dae-867b-431e-b874-53b179aabcf1/ripaziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cedae12-2906-4c54-9179-67539ee00dab/61693430965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82d6824c-9ff1-4a3c-b008-5a41cc285e8c/47171687508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee92853a-31b6-461e-9f71-7506fc60abd0/penixabuduwogimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f601a6f4-654e-4229-8a6b-505a60839d92/redobebezusunekuxekiwun.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34462ab79f442f238dc9b/t/5fd61eb9481cfa31adbf4c4d/1607868090373/60335493547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51733de0-ef2e-41ae-906a-2b3672e929ef/lexus_is300_repair_manual.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_off0000c3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B1 5596 bytes
SHA-256: 3fc0b80efdac7d1387638658492b1dd40425475e7de92b959309cf44ab663746
font_01_sfnt_off0000d6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B8 11048 bytes
SHA-256: 8402fe1df868acad78af7b6cb8d3e86cc8abd120575dd805f1be5f6ef5c1b329

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