Malicious PDF — malware analysis report

Static analysis result for SHA-256 9534acbdaf0d1f29…

MALICIOUS

PDF

39.5 KB Authoring application: Mobipocket Creator
MD5: c47a0dd18880b022ae05b7e29e689831 SHA-1: 521e6dc43450d2f91df86206cdd929fe5ae7b917 SHA-256: 9534acbdaf0d1f293486eb71e8764611e4f1bf31321453f232858b1d4a143e44
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. No scripts were extracted from this sample, but the extensive link farm suggests a phishing or content distribution vector.

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://ssjo.org/uploads/1/3/0/5/130545360/9214805.pdf
    • http://bubblebag-australia.net/uploads/1/3/0/2/130270812/9538786.pdf
    • http://becomeaconqueror.com/uploads/1/3/0/7/130775380/bavumazuwojavorate.pdf
    • http://www.alexkd.com/uploads/1/3/0/5/130540286/fb1d1aa5d.pdf
    • http://drroddysuos.com/uploads/1/3/0/2/130271224/dec1872910bc5d7.pdf
    • http://computatumservices.net/uploads/1/3/0/7/130739061/sinapikapigenup.pdf
    • http://aextracts.net/uploads/1/3/0/6/130639217/16619bf46356f0.pdf
    • http://alpha-deals.online/uploads/1/3/0/6/130639600/c16f0ca.pdf
    • http://soundoftheshoals.com/uploads/1/3/0/3/130323952/bidopawifogunuxizir.pdf
    • http://newmillerdam.org/uploads/1/3/0/5/130588529/8ef623f573db19.pdf
    • http://lucernecountryclubrvpark.com/uploads/1/3/0/5/130550873/4904631.pdf
    • http://schmittsanimalhospital.net/uploads/1/3/0/5/130588703/wajuluxezejulor.pdf
    • http://x0689541xstreamtravel.xsideas.com/uploads/1/3/0/6/130620701/130620701.html#mapa+politico+de+asia+para+imprimir+en+blanco
    • http://schmittsanimalhospital.net/uploads/1/3/0/5/130588703/wajuluxezeju

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d84.bin
9ed7cc55c7463e0fb2cb1de3a31e887cdc2f5ff13b11cc6dd30a8f877f1dd6a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D84 4516 bytes
font_01_sfnt_off00004062.bin
cbd0c868aa3ccb72af2de2c372b1a8786663695b3e47598635b042bc9b202c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4062 9140 bytes

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