Malicious PDF — malware analysis report

Static analysis result for SHA-256 b311f297e7f5985d…

MALICIOUS

PDF

37.8 KB Created: 2020-11-02 09:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4b4aacbace8c9728e7999fc8dd2a26b9 SHA-1: 1f8f76d5d6f9671f5c77b3d2215675d9c09d890c SHA-256: b311f297e7f5985d70f654030e8573bcd9c275be71f2bc2f408eab6b9a78bdf0
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/123?keyword=coleville+high+school+california', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware site. While no scripts were extracted, the presence of the malicious URL and the ML classifier's high confidence suggest a malicious document, likely delivered as a spearphishing attachment.

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.link/123?keyword=coleville+high+school+california In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8cca6f60019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8517/8027/files/zezija.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/manchester_city_women_s_football.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/raranumibugaban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2090/9207/files/31759684502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c1c828-4b88-4f7b-bb23-78fc9b0b75c8/76745864230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6747e543-c2f3-485a-bde1-f00306452e67/polk_audio_db652_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/bajosaxizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2333/5065/files/golutifukonimif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/53814655384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4986538-2b92-48ba-87db-f2aee219a912/9403936937.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/9390410083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701c4ef2-aadd-489e-ac21-5938c2205627/dogisuwe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48BE 2976 bytes
SHA-256: 2a48089c01b41cc93def023398e36ec501c38ca4d8be763f299d86b2ddecd2e3
font_01_sfnt_off0000536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x536D 5108 bytes
SHA-256: 67164354c46c585bbb1e008893d3cfef2e47a9e4cc3b088be9a4c70f9646ace8
font_02_sfnt_off000064d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D8 10972 bytes
SHA-256: daf4c71c118cedd9e856ce11e5cf96cc6de4ac8f68a4b55f5e6d951e23dc655d

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