Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e50a3e2a8d51de…

MALICIOUS

PDF

43.6 KB Authoring application: LibreOffice
MD5: 9b64eed91c7c8fdebceaf93ab6d00644 SHA-1: 1a591e483436cb54e751047db125a99ce3b95b01 SHA-256: f8e50a3e2a8d51de5bbed81aff8b3a3e3dfbcf93b429f42a3de1873770ee93e0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_LINK_FARM indicates the presence of a mass external PDF link farm, with 22 links generated. The document body contains numerous embedded URLs, suggesting a phishing or traffic redirection scheme. 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://annabelle-t-taylor.com/uploads/1/3/0/6/130620857/7368738.pdf
    • http://nichellerenee.solutions/uploads/1/3/0/5/130539774/2107532.pdf
    • http://chunkeymonkey40.com/uploads/1/3/0/3/130323507/fb445aa5961.pdf
    • http://scarbroughfamilyeyecare.net/uploads/1/3/0/4/130483155/1981212.pdf
    • http://birrddy.com/uploads/1/3/0/6/130604369/1be5d3f7.pdf
    • http://waterstonecafe.com/uploads/1/3/0/5/130590133/3e843e2fc.pdf
    • http://mrhowe.org/uploads/1/3/0/6/130604238/nonowokizesunupovugo.pdf
    • http://kenya-help.org/uploads/1/3/0/6/130604393/5814418.pdf
    • http://jen-sovety.info/uploads/2020/01/28/zuvawifigisi-jivejalam-wikozugapafinep-wepomezabuduzoj.pdf
    • http://saventans.com/uploads/2020/01/28/vexipawodosoj.pdf
    • http://afcointl.com/uploads/1/3/0/5/130539652/jamifonu.pdf
    • http://northernrailleaders.com/uploads/1/3/0/5/130590375/130590375.html#treatment+of+acute+rheumatic+carditis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000129d.bin
a669423f02cff8e9727d11acbfcf53793e81950349a6118c08a1e94bd44f26d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129D 7836 bytes

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