Malicious PDF — malware analysis report

Static analysis result for SHA-256 82598282e4813158…

MALICIOUS

PDF

41.5 KB Authoring application: OpenOffice Draw
MD5: edc455607e73f5d80842299c2c06630b SHA-1: c12c8ebe0b3645032cfd7348b059900ff9363b4f SHA-256: 82598282e4813158d4b9d2a01bf5eb90f42d03285219e4145c4fd124f0979cba
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier's high confidence score further support a malicious classification. The embedded URLs suggest a phishing or traffic redirection scheme, aiming to lead users to potentially malicious content hosted on various domains.

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://rightjoin.com/uploads/1/3/0/4/130478205/gesusof_wikan_jilemik_tuluru.pdf
    • http://eatwelldietician.com/uploads/1/3/0/3/130313539/8891914.pdf
    • http://alkuksa.com/uploads/1/3/0/2/130288594/fusizud.pdf
    • http://moanalipopo.com/uploads/1/3/0/4/130488700/bepabigokamulofa.pdf
    • http://solanii.com/uploads/1/3/0/6/130604544/dasavesep.pdf
    • http://notoedrag.com/uploads/1/3/0/6/130639309/dipajikafej.pdf
    • http://bkhouse.services/uploads/1/3/0/5/130550834/2439491.pdf
    • http://lezadota.paypal-account-support.bz/uploads/2020/01/28/nuvanag_gaguve_jasirej.pdf
    • http://allamericandogexpo.com/uploads/1/3/0/6/130640227/130640227.html#free+printable+mathematics+worksheets+for+kindergarten

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001197.bin
6c4bafb76086a8c3f35e6369e62f912d94aeb92d0d0637cb26a3faa7f1d983f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197 7376 bytes
font_01_sfnt_off00005c14.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C14 16036 bytes

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