Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8e3854cfc2cd6b…

MALICIOUS

PDF

39.5 KB Authoring application: Nitro PDF
MD5: 3ce7b3f07624847bd211406f9cb387db SHA-1: fc2c626eb5289e17f029ec37398d49e5388225eb SHA-256: 2b8e3854cfc2cd6bdaa0aea5b5d8a22464a6b428fab4c32c8e3b66be1af5546e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm, designed to lure users into downloading further malicious PDF files. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggests a phishing or traffic redirection campaign. The document body, while containing some obfuscated text, also includes references to 'Cambridge english advanced practice tests pdf' and lists numerous URLs, reinforcing the phishing lure. 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://weddingproct.com/uploads/1/3/0/6/130603894/58b424993c3.pdf
    • http://bringmorehappy.com/uploads/1/3/0/4/130476205/jepebelesal.pdf
    • http://vidyavara.com/uploads/1/3/0/5/130550723/xofunumezitasup-xikemo-gigusoge-famudebadinen.pdf
    • http://accademiale5sinergie.com/uploads/1/3/0/5/130588733/7771159.pdf
    • http://varliakademi.com/uploads/1/3/0/7/130740051/a2fd48abd7.pdf
    • http://natashacorriephotography.com/uploads/1/3/0/6/130620755/fesuzefejef.pdf
    • http://batimupe.gsustudymatch.com/uploads/2020/01/28/522116.pdf
    • http://puriri-wiltshire.co.nz/uploads/1/3/0/5/130588258/8904335.pdf
    • http://boneandstone.net/uploads/1/3/0/4/130476505/buzosagunubep_zutuzonufu.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/5/130551429/130551429.html#cambridge+english+advanced+practice+tests+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013cf.bin
31b95ad4902cb4c33cdf98e63a4ac5084f2e6803bf67dad333e1fd1ca3d3e442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF 11752 bytes

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