Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce5dfcc5b3af5f6…

MALICIOUS

PDF

34.5 KB Authoring application: OpenOffice.org
MD5: fda6930d34e8c125d9d5c3348bdb89dc SHA-1: c39e3d28de6cf8ca6bcdcf969cb177e69bc3712e SHA-256: 3ce5dfcc5b3af5f680083177fbec4acb441ab677fa79b4245fee1adc328ccb57
150 Risk Score

Malware Insights

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

The PDF heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, with the dominant host being norcalactive.org. The document body, though heavily obfuscated, contains text suggesting it is an instruction manual for a Kitchenaid coffee grinder, likely a lure. The embedded URLs point to various PDF files, suggesting a phishing or malware distribution campaign. The ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports the phishing and malware delivery intent.

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://norcalactive.org/uploads/1/3/0/6/130604428/vujepexa.pdf
    • http://naturalraysllc.com/uploads/1/3/0/2/130271207/520806.pdf
    • http://6000hudson.com/uploads/1/3/0/3/130379352/taruk-gobudunezokav.pdf
    • http://sabyhage.se/uploads/1/3/0/2/130288498/3652296.pdf
    • http://wallgears.com/uploads/1/3/0/6/130640155/gopezekotekuse_fafotetom.pdf
    • https://jupedisa.weebly.com/uploads/1/3/0/5/130541763/govozop.pdf
    • http://minitechmachinery.com/uploads/1/3/0/3/130313491/130313491.html#kitchenaid+coffee+grinder+instruction+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c7.bin
f11bb972d5d60a62e5502b3747b1e6fba25cfd9abdf3cedefa2743208190af97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7 8304 bytes

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