Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8702706e7eff5f7…

MALICIOUS

PDF

89.2 KB Created: 2021-01-24 01:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 23329046e28447d6c802472e565e660d SHA-1: 0cb6cb21130c9d2f547b38cdeb4e9e4331141375 SHA-256: a8702706e7eff5f70fa6d56715352aa196669083b70d3cf735beb8d9c6c98340
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://traffmen.ru/aws?utm_term=sort+excel+worksheet+by+date'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

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://traffmen.ru/aws?utm_term=sort+excel+worksheet+by+date In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ffd4db169987.pdfIn PDF document text
    • https://site-1176846.mozfiles.com/files/1176846/kamifenadabinodalakalop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406514/normal_6004f365debc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472763/normal_5fd3a6d3a17b4.pdfIn PDF document text
    • https://site-1174105.mozfiles.com/files/1174105/47999094607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5febf87377bf0.pdfIn PDF document text
    • https://site-1243869.mozfiles.com/files/1243869/always_on_display_android_6__0_1.pdfIn PDF document text
    • https://site-1239447.mozfiles.com/files/1239447/como_por_o_instagram_preto_android.pdfIn PDF document text
    • https://site-1179246.mozfiles.com/files/1179246/jikewagowoxejuzoxow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5fdc6a1026307.pdfIn PDF document text
    • https://site-1083781.mozfiles.com/files/1083781/bojoro.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/kobivimelelo/fevobapironowizor.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/75382018547.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/47276234309.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/24386431975.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/different_moonkin_forms_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/52397881975.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_off00011eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEA 5596 bytes
SHA-256: bbf19a283608927f5e127d0045d4d639630fb36eaf082d5eeb02df0163b63079
font_01_sfnt_off0001320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320C 10936 bytes
SHA-256: a9ebdc1bca5ee2d27b053f60066bbae4b744b60ae5d67844837830dd1f0bef4a

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