Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6dbcd1402243da…

MALICIOUS

PDF

64.1 KB Authoring application: OpenOffice.org
MD5: d72e695ff76782bc5bd4f4034847d035 SHA-1: 983974b9a5e28c61df1b1c6e4ec9a2e850f9588b SHA-256: af6dbcd1402243dafa8e50dc9bc6033946105623c34b853e146d3d8eddc79813
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 external PDF files, a technique often used for SEO spam or to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is heavily obfuscated and does not provide clear user-facing text, but the presence of numerous URLs points to a link-farming or redirection attack.

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://bcattic.com/uploads/1/3/0/5/130550968/jupotebu_bogoxupovikak_banitisopuvakax_zakupefiga.pdf
    • http://redeyeapparel.com/uploads/1/3/0/3/130379252/mugalefak_velebav_mibiroma_fozezazadidixus.pdf
    • http://beeclubsales.net/uploads/1/3/0/5/130551463/kotosage.pdf
    • http://thequiltstudio.com/uploads/1/3/0/5/130589020/wejatewevu.pdf
    • http://ruefrancaise.com/uploads/1/3/0/2/130270796/ef05337.pdf
    • http://nawahte.com/uploads/1/3/0/3/130323526/5753979.pdf
    • http://mortalissar.com/uploads/1/3/0/3/130312968/2a975a939b88.pdf
    • http://biketoworkmemphis.com/uploads/1/3/0/5/130590474/bed1cc88800f8e4.pdf
    • http://mybowerstudio.com/uploads/1/3/0/5/130590461/c26ee6bc407.pdf
    • http://my-consequences.com/uploads/1/3/0/6/130604984/xifulalepegojozi.pdf
    • http://bitsbridlesbrambles.com/uploads/1/3/0/4/130476514/regiwukawumabanam.pdf
    • http://pameladirnberger.com/uploads/1/3/0/7/130776425/130776425.html#basel+3+reporting+requirements

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015ac.bin
4b96232e671431ec2882abb180c40aa26db4bd0d5a6f297aa2a959a1d83068ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC 9632 bytes

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