Malicious PDF — malware analysis report

Static analysis result for SHA-256 292c8a3b3dc4c228…

MALICIOUS

PDF

51.9 KB Authoring application: PDFedit
MD5: d8c8409bab9a19ce92d38836fa6ad9e1 SHA-1: 7ec5de6e5583ed40790779cd1e4b5fda4e63c354 SHA-256: 292c8a3b3dc4c228751a5485e0663482dbc6a5f94ccd020c25fa12466c1d991e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to other PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs suggest a phishing or redirection campaign.

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://rapidcityweb.com/uploads/1/3/0/2/130287279/wexiwag.pdf
    • http://perisjewelry.com/uploads/1/3/0/5/130544072/wiwulerimiti-xazob.pdf
    • http://joycrownedproducts.com/uploads/1/3/0/5/130551247/244434.pdf
    • http://ace1m.com/uploads/1/3/0/5/130551266/perojokumiruvub-gukubilotamuxav-nuvizogobaz.pdf
    • http://mentorhood.com.hk/uploads/1/3/0/3/130379367/8945859.pdf
    • http://nuancetravelacademy.com/uploads/1/3/0/5/130589322/b946e9392.pdf
    • http://persistress.org/uploads/1/3/0/6/130620172/zijuvug.pdf
    • http://myedmontonaccountants.com/uploads/1/3/0/4/130488851/2101c76026bbe.pdf
    • http://cvillehomeimprovements.com/uploads/1/3/0/5/130544390/resupo.pdf
    • http://mikhaelbassilli.com/uploads/1/3/0/6/130603802/c8f2da6a801.pdf
    • http://multistreams.com/uploads/1/3/0/2/130270866/130270866.html#rationalising+the+denominator+surds+worksheet+with+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001331.bin
503f565ae3304c0c6a8389534917b8f06f0b1ad3877d07652f9da43acfdc73d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1331 8536 bytes

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