Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df46fec877d88f1…

MALICIOUS

PDF

39.4 KB Authoring application: Solid Converter PDF
MD5: d80d89df970b010c0acc47e6c60bc750 SHA-1: ce6b528fa20ef07bfe6ce9fac84c5854178059e7 SHA-256: 3df46fec877d88f1c3913e6a13aec721ddc7fe1fbd959271390e24cc0f464294
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The document body, though partially corrupted, contains some of these links, reinforcing the idea that the primary function is to direct users to external resources. No scripts were extracted from this sample.

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://dcexploration.org/uploads/1/3/0/5/130543569/kanipotogize.pdf
    • http://taocostarica.com/uploads/1/3/0/5/130588651/bd82255b.pdf
    • http://nourishsinglemoms.org/uploads/1/3/0/8/130813648/zobutironufes_juwokozugomul.pdf
    • http://noeticanalysis.com/uploads/1/3/0/2/130291910/e8b807.pdf
    • http://cloud9weddingflowers.com/uploads/1/3/0/6/130620854/mazaronariri.pdf
    • http://sweetpeawholesomebaby.com/uploads/1/3/0/2/130271017/3409507.pdf
    • http://acupuncturehilohawaii.com/uploads/1/3/0/5/130539990/gazuzuredive.pdf
    • http://ndchair.com/uploads/1/3/0/6/130620251/130620251.html#acute+left+shoulder+pain+icd+10

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001130.bin
1c02f63b76a9f910711850c2bf6d00b9fc53d158b99df38687c54cd3e19503bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1130 7784 bytes
font_01_sfnt_off00005f02.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 2652 bytes

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