Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea482a4ab9e1d50…

MALICIOUS

PDF

61.0 KB Created: 2020-11-10 14:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c36fafeeb005244ebf35662bfe811457 SHA-1: d91abe4bda3d141c32b08ee4ba07e9c5fdacbace SHA-256: 6ea482a4ab9e1d507a0c33cf9af72956991a5df3172711f14c8775cf68c2ab78
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 'ggtraff.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/strik?keyword=discovering+french+nouveau+blanc+2+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_5fa9fe554f100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5f9a0a3859948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f8a664dc11a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fa30362158a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f9faed9cd0f5.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/fulazelof/what_village_is_kakuzu_from_naruto.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/algebra_regents_august_2018_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/warranty_deed_form_maine.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/9228603112.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/83123956657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5a0c16-4b89-4975-b760-9a195c0fe857/zesilevidixadisup.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/velefosajexem.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_off0000b0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F1 5568 bytes
SHA-256: 3d5af5cdad24307cb8e9c287845dd4c637d0e15e1c4da712cbbf789bd082099f
font_01_sfnt_off0000c3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 10396 bytes
SHA-256: d71e065e47504623765459822d57d99b2793f4b5a5575dfd06fec7a904b67a93

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