Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57c95ba4d7c1dbc…

MALICIOUS

PDF

68.9 KB Created: 2020-12-09 01:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb560f8ae0227b16931f61d4d392508 SHA-1: 1ea8208cd68cb786622e4d30529150d6b83e486e SHA-256: c57c95ba4d7c1dbc5d018967cf0d73b05865a9f96ba13466e6b168b9e77b233b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. Although no scripts were extracted, the embedded URL and the nature of the heuristics suggest this document is designed to lead the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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?utm_term=atoms+in+a+mole+calculator
    • https://wenozujilemufo.weebly.com/uploads/1/3/4/4/134456287/11f95efc.pdf
    • https://cdn-cms.f-static.net/uploads/4501962/normal_5fb2a0a7afdf2.pdf
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fab39a6dd7ee.pdf
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5f9734ad22def.pdf
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f897c6793a85.pdf
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f9c126cab58b.pdf
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fa99065239e3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xabalaru/racing_rivals_android_hack_apk_2019.pdf
    • https://uploads.strikinglycdn.com/files/5720a4ca-ff36-4d2d-8e46-916e8db35dd6/3472860648.pdf
    • https://uploads.strikinglycdn.com/files/ddf44b05-4ed5-4ec0-aa2d-92dd52db3ac5/office_kaizen_william_lareau.pdf
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc0e8bea97599144e1872e6/1606478016065/nategikerakuju.pdf
    • https://static1.squarespace.com/static/5fc18c699698b02c7f25315b/t/5fc6c0cc0623334b0c490a42/1606861008012/jewiretowifanomalilimil.pdf
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fca67d93a76450e087f8039/1607100377939/multi_parallel_multiple_accounts_apk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb6.bin
39e49986984601e5704a4b91d61fea4f7521ef4acf6af268790e73cc9c0893a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 4936 bytes
font_01_sfnt_off0000e05e.bin
de6e948bca02becd5595ff59009e1c5400b38f751654532e889b622c50de2bc6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 11264 bytes