Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66d51170e17f76c…

MALICIOUS

PDF

58.7 KB Created: 2020-11-11 21:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9f4b4e5d69c84bac690b171b3b3644cb SHA-1: 704c5cb49fc23d38eb606c1a2a16f9bbe5f47cef SHA-256: a66d51170e17f76cf40fcb0271068cf28b5990597df4c714f6cd4916141c83a0
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 'traffine.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/aws?utm_term=chahun+main+ya+na+ringtone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f9695d7ac6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_5fa43593f0089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8d6f836bf69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_5fa10b8ab6025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406809/normal_5fa7a9d787981.pdfIn PDF document text
    • https://wanexopoxada.weebly.com/uploads/1/3/4/7/134704754/binurejajokizinog.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/9527818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874dcd68ee5.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.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/68d1ba39-6818-457f-a94d-ecf4d254b9bd/115786397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2edd0ea-b610-4b91-9c58-e3ad3328093f/xipeninekafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b005c44-0e59-42e5-a0b1-389f8073fe2c/thank_you_letter_sample_to_your_doctor.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_off0000a8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E1 4896 bytes
SHA-256: f1e16135843c4f13501221d781dbc0b49da8cb39ce7888f699a2e275c8d28696
font_01_sfnt_off0000b964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB964 10324 bytes
SHA-256: 4650134f055f1e5c4977358cf2994944aaa74bc6c1cb030beaff8e7a18b3e76b

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