Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aef2690d99a2453…

MALICIOUS

PDF

33.1 KB Authoring application: Nitro PDF
MD5: 8b68d454daf9f376ee0a6c057e378122 SHA-1: 9646891d7f61b29a3d54d4e6b3a2d817e8e162e9 SHA-256: 4aef2690d99a2453bd448605ecb1612f91a845bdc9e9b46bc4f23fd8e9dc0a29
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or redirection scheme, commonly used to distribute malware or conduct phishing attacks. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious traffic generation intent. No scripts were extracted from this sample.

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://treeservicetravelersrest.com/uploads/1/3/0/7/130739616/vezix.pdf
    • http://displacedurbanite.com/uploads/1/3/0/6/130621952/e507ec5cfe6224.pdf
    • http://europeanfenestrationsystems.com/uploads/1/3/0/7/130738597/562bdc4ff.pdf
    • http://batteryconservancy.org/uploads/1/3/0/5/130588412/depewogeritilize.pdf
    • http://benbenstore.com/uploads/1/3/0/3/130379362/2935759.pdf
    • http://brightbuzz.biz/uploads/1/3/0/4/130488101/jumumemepeda.pdf
    • http://tokeplusherbs.com/uploads/1/3/0/2/130289731/8224872.pdf
    • http://mikkinicolecollextion.com/uploads/1/3/0/8/130813957/romebiwavuwuxer.pdf
    • http://shadowbendtest7.com/uploads/1/3/0/7/130740080/8915861.pdf
    • http://nothincookiecutter.com/uploads/1/3/0/6/130621140/8289198.pdf
    • http://2019taiwancvcforum.com/uploads/1/3/0/6/130620244/7653625.pdf
    • http://available44.unix1.com/uploads/1/3/0/7/130776253/130776253.html#cumulative+frequency+graph+interquartile+range

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002af1.bin
bec71fec4a30375f1a77f6dc783be361d3b39b5b3225fd5e8f05519574810249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF1 7740 bytes

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