Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39f51dee1ba19b6…

MALICIOUS

PDF

72.9 KB Created: 2020-12-30 23:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ccb44812830d16d7962ffd89afdb85ce SHA-1: 899cae606b04690a048fbf8c9483caa048053116 SHA-256: f39f51dee1ba19b6ce4b8569a78b5b69d9728785a49cb845a347f599f918ed8e
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. Although no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=9%20months%20that%20made%20you%20parents%20guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4447276/normal_5fc81a50017e9.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/goveruduzewoxu/william_marrion_branham_sermons.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/30916832565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62151148-7b4c-44c5-953a-c0b66f3490be/6070644855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a4cb1a-c0cc-4886-9dc8-b7b36fdeed1c/warband_viking_conquest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/vobetipimaguzez.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/cribriform_plate_csf_leak_radiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d353164f-df29-410d-8f4b-2e5eec894db4/33542871510.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/modded_agario_server_bots.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/85709618371.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/nox_windows_10_64_bit_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/kutiv.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_off0000e0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D2 5504 bytes
SHA-256: 9c797abb40b6730a5edb2e5353e036930c177f5a8004c430246d23cf2f87bb70
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 10532 bytes
SHA-256: 7b089bfa7b615704b278203ed008e02316a931b60825337b6682f734e8dac61a

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