Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1a8fb3fa3827c8…

MALICIOUS

PDF

41.8 KB Authoring application: PDFedit
MD5: 04bae02e65287b7137bc7769a9219ec1 SHA-1: b2992b1ce4bf8ee6d5a3efb5a343063fa9699d48 SHA-256: 5d1a8fb3fa3827c8c0bcc5e6e2efafbab5396e1257819a043cf27a4914d3a6e4
152 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary attack pattern involves a large number of embedded external links to other PDF files hosted on various domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or content distribution tactic, potentially related to SEO manipulation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://atlbloggers.com/uploads/1/3/0/6/130621300/f918e316f7cd5.pdf
    • http://mathens.net/uploads/1/3/0/4/130435574/sukuwurexolenu-jiravunegogojib-rivuxoxiruli.pdf
    • http://newelementkc.com/uploads/1/3/0/6/130621854/nosenivupubexanufoxu.pdf
    • http://forecastcreative.com/uploads/1/3/0/2/130272619/729bce8c6.pdf
    • http://copperpotcreative.com/uploads/1/3/0/2/130274345/diwax.pdf
    • http://staceyjanedouglas.com/uploads/1/3/0/2/130273814/c52aaab3addc38.pdf
    • http://polato.net/uploads/1/3/0/5/130551141/sakivoranu-vojaxog-kuzagewifaf-madolox.pdf
    • http://pameladirnberger.com/uploads/1/3/0/5/130539696/130539696.html#supercapacitors+review+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001179.bin
966a3fbd9a0c74da7f01b9c62dd4c88f214d4e67f4fe762bb9a1c7574f021cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1179 8644 bytes
font_01_sfnt_off00005ab6.bin
0069f13915edab9d80a8dce905535a34121a50b902328e3d862864564fef7ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB6 4524 bytes
font_02_sfnt_off00006889.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 2600 bytes

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