Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce9c78ba05b1714…

MALICIOUS

PDF

41.5 KB Authoring application: LibreOffice
MD5: b0c590ea9f5f2064d84d966b75dd81c1 SHA-1: 249f856f69df51a83d928f9ae18b8ebff305bb50 SHA-256: 6ce9c78ba05b1714406e41ae7409c44884becb60f859b7bf67a3404495c9f7da
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm, which is a common technique for distributing malware or phishing content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further indicate malicious intent. The document body, though partially corrupted, contains references to the URLs and mentions 'Inquisitorial system advantages and disadvantages', suggesting a lure to disguise the malicious nature of the links.

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://our-rainforest.com/uploads/1/3/0/2/130272847/6f8a3877b8207.pdf
    • http://msptohumboldtproducts.com/uploads/1/3/0/4/130436049/3ae6273f0a02b20.pdf
    • http://nanomat2019.com/uploads/1/3/0/6/130605074/ragixew.pdf
    • https://rufawilezu.weebly.com/uploads/1/3/0/3/130313755/7425966.pdf
    • http://vagakatip.balancebord.ru/uploads/2020/01/28/f10258d02ea35.pdf
    • http://humanizingtheenterprise.com/uploads/1/3/0/4/130483928/kikemetun-xibisuke.pdf
    • http://nutrizionistagiuliaporcu.it/uploads/1/3/0/6/130639839/laleragazoxilakave.pdf
    • https://jiwigoxujupoj.weebly.com/uploads/1/3/0/5/130544746/nikukito.pdf
    • http://pameladirnberger.com/uploads/1/3/0/6/130639145/130639145.html#inquisitorial+system+advantages+and+disadvantages

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011cf.bin
2756ac1a891f1319be5b42193bc413be1cbe843eea1d992b4aae0a19ed476d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF 7800 bytes

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