Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf993c59b97696e…

MALICIOUS

PDF

75.3 KB Created: 2020-12-25 00:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a89b1744cf599cd8115edb4682dc0f86 SHA-1: bc35fd882d708ad54b01b0441daf6edc1ba72611 SHA-256: 1cf993c59b97696ea3d4f0c055eac2053925cd2c38f22e2bb3f1e15636d2526e
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 disguised as a download for an album. This indicates a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site.

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://ggtraff.ru/aws?utm_term=afroman+full+album In PDF document text
    • https://cdn.sqhk.co/numanazolov/jjERegh/downhill_mountain_bike_racing_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/javufikari/Ihegfic/hack_mod_among_us_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5fa2307e43cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f8b76300be43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f902c8876199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5faf7ab83058b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_5fc327e9370be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5fa39bc3e4b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5fa52bf0286b4.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegejivo/ajgjgSA/zimivarixepomeperibiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f959ce6e944e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_5fc13336e7ca6.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/6e79564e-544a-44c8-92b5-a768054efcf8/hypointense_on_t1_and_t2_mri.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/83783540234.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/vcf_viewer_free.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_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 4864 bytes
SHA-256: 03fb47e3b48f51c4e7fdfc54dd3cbcb7ba9b65e9d624601968ade18ed794a3fa
font_01_sfnt_off0000f8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EF 11732 bytes
SHA-256: 52fc0c35609c0081b0ec360b6eba46177ea591353ebe16595bb4be1cd74c2f16

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