Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1d69b72cb318fb…

MALICIOUS

PDF

50.1 KB Authoring application: Soda PDF
MD5: de41b3a70752f63ec922542d6caf202a SHA-1: bc40fdb38a4573c628781d6dc8e4e4bdf049f330 SHA-256: ca1d69b72cb318fbb75c80ff21eeed3fad97e646dd0203f9e68662a0d2d2f443
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or redirection scheme designed to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly support a malicious classification, with ClamAV identifying it as Pdf.Phishing.TtraffRobotInstall-7605656-0.

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://ivyleagueteacher.com/uploads/1/3/0/5/130541881/4689572.pdf
    • http://presqueassezbien.com/uploads/1/3/0/7/130775646/7697222.pdf
    • http://realmrketo.com/uploads/1/3/0/5/130588468/f5add9ef67218.pdf
    • http://jacksonjuerlinggolf.com/uploads/1/3/0/6/130621228/470f4faf9aba.pdf
    • http://saffronskyphotography.com/uploads/1/3/0/5/130550976/xurerumes.pdf
    • http://errqre.com/uploads/1/3/0/5/130539792/b77aecc89b575.pdf
    • http://andreyslawn.com/uploads/1/3/0/6/130621205/kuwerem.pdf
    • http://acerecoverygroup.com/uploads/1/3/0/7/130775731/lepowitubelijijumuxu.pdf
    • http://drewmohoric.com/uploads/1/3/0/5/130551756/1085502.pdf
    • http://stickemupcustomdecals.com/uploads/1/3/0/3/130379627/4c1177aa6639.pdf
    • http://gatewaytakanini.co.nz/uploads/1/3/0/6/130621279/7420756.pdf
    • http://bradfordbunch.com/uploads/1/3/0/6/130621791/tofubujozu.pdf
    • http://bridgestreampublishing.com/uploads/1/3/0/4/130483368/130483368.html#ielts+book+8+listening+test+4

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c8.bin
7698cfbd9289d537fe8b4706eae73dcd5aa9ac4fd1376352cc49db18630ece4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C8 4212 bytes
font_01_sfnt_off00005378.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5378 16036 bytes
font_02_sfnt_off00006ac9.bin
08673242514d74c70a05d5f9436392c0c2fc6f447ca347a51085d823d61d5781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 8552 bytes

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