Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d151a32b90cdc31…

MALICIOUS

PDF

40.0 KB Created: 2020-11-03 22:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a87d1fdfe4ba2ecd199f5ccbd4227f0c SHA-1: bacac5b80fec8f9922b99f16cd80dc41ceed2ccf SHA-256: 5d151a32b90cdc3115ab66135a45716889ec7a74ef750ea3825193e338db7660
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ttraff.cc/123?keyword=importance+of+nature+in+pop+culture, is the primary indicator of malicious intent, likely serving as a lure for a phishing attack or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.cc/123?keyword=importance+of+nature+in+pop+culture In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f9a6e208b657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f87320da1790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5f94176048efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_5f8c9d222cc14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f8f549ded1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8876c3da0f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f8cb4649d0b2.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/henghuili-files2/logical_reasoning_and_analytical_ability_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/convertir_archivo_de_a_word_small.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e419a20-d69b-4542-87f1-44f214e5c77a/daxuzovaxenaje.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/geometric_sequence_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/95982446270.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/e46_manual_transmission_fluid_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/cariotipo_del_raton.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_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 4920 bytes
SHA-256: ae84ce7d21c4ce778e493465eca118d126b77556eb3dff1e6e37fde28ca4a1e7
font_01_sfnt_off000070ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FF 9944 bytes
SHA-256: e34f9c33b42247d94cc203a39f065bebbeee91a0a0579005d09da796433385f3

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