Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7c6fb03601ad33…

MALICIOUS

PDF

72.0 KB Created: 2020-12-28 05:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 919e883a9e239031dcb664e53d7ab03e SHA-1: a685a12afbde888017feb5086e9c20f9ea8d0639 SHA-256: 9c7c6fb03601ad336e88d5f817f0907143020507a6f48aa7029b010a3bc4d50a
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a link to 'ggtraff.ru' strongly suggest a phishing or redirection attempt. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. While no scripts were extracted, the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=abbyy+finereader+6.+0+sprint++windows+7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f992d7e5ef92.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/706058b3c.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/dumepumaxubalonok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fafd4976a6c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_5f9aadc5be381.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/3700803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488101/normal_5fb7af5a19656.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/27ef653f-6b43-41d0-8ccc-dc08d4173c5d/konub.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/aamirror_apk_debug.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/77580728676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ff7572-247d-4084-bb80-ca8bc7c6fc0d/80481606218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cc830a-e4d3-45db-b237-e3b662a963d2/zajurefiwisapufugazap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539d293f-eb30-418f-b7d7-739d6b937fc3/zemavipetexat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bf0a28-4304-46eb-8295-f6451ee724dc/63115175710.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_off0000d890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD890 5732 bytes
SHA-256: 07faac2ad47e6356cc0352014ef366a28ee4d494bdb6fe27ba06eea36d056256
font_01_sfnt_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 11564 bytes
SHA-256: 82cb3984acf0d3f1f24f6cd03e82edf0418ace7534691c2473f0110d6658387a

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