Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3c3ba68ab773d3…

MALICIOUS

PDF

96.5 KB Created: 2020-11-03 22:23:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 794bf90e5db081d79c8f430e937d5b30 SHA-1: c752fe05deaf302c621f9c0f319741f8ffbab2e4 SHA-256: 4c3c3ba68ab773d30e0620799f43262bcb8b64d9e15a214f18f6be3ffa1ccf18
94 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 'https://ttraff.cc/123?keyword=one+piece+filler+guide+reddit'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

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=one+piece+filler+guide+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5f8f646ebcff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8b6b0db1c6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f88d991ec88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_5f9c9adfd2da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f92843317f7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f89059bacaa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5f97de3669c32.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/pusumowi/xizududesorokub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07d7560-cdae-406e-b01d-0d7dfc8386d8/manowepewufuzulore.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/cdn_cloudflare_jspdf.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/77688183974.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/xylem_and_phloem_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/27491375402.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/bunudi.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/mavavixomup.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/vidiwoduxemeredubisuwol.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/3203948065.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_off00013cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF2 4960 bytes
SHA-256: de7bc29aa835b4b061998b7887cd9e3da64ee42ef337941dbde177b96edf7311
font_01_sfnt_off00014de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE2 12036 bytes
SHA-256: 1f98342b83ad3144d7225f81630e68b80d4978b2300b6937b26424b81d3f191b

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