Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa88eeb1560898d…

MALICIOUS

PDF

47.5 KB Authoring application: Adobe PDF Library 9.0
MD5: 037d4b0a01a2d81813acb8abd9245968 SHA-1: 8237cb626208532e8572bc07e23ceb07478c705e SHA-256: 9aa88eeb1560898dbfea9bc591de5405f65722458fb58d82661151f511c20670
150 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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this file as malicious. The embedded URLs are likely used to distribute malware or engage in SEO spam. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://healthiersoils.com/uploads/1/3/0/5/130589049/8983125.pdf
    • http://annearundelbiz.com/uploads/1/3/0/5/130551186/wirozidikanujig-nuliregudakut-vatowenubimaz-wolabojogidem.pdf
    • http://www.windowcoveringiq.com/uploads/1/3/0/6/130604597/mararejo_xuker_zosediparu_wuvil.pdf
    • http://mooreandord.com/uploads/1/3/0/7/130738752/2adff4.pdf
    • http://heuristicsystems.net/uploads/1/3/0/6/130604667/5dfdaaa02ad0ce7.pdf
    • http://fasttraxxx.com/uploads/1/3/0/6/130620494/xokodata.pdf
    • http://alfordablecuts.com/uploads/1/3/0/5/130539795/420036.pdf
    • http://nathanleakey.co.uk/uploads/1/3/0/4/130489706/kotugo.pdf
    • http://thehappylifeacademy.com/uploads/1/3/0/4/130435771/71976b0c.pdf
    • http://hostmaster.luckystrikeii.com/uploads/1/3/0/7/130775594/9a08c2b940.pdf
    • http://rtaylorbusinessadvisor.com/uploads/1/3/0/4/130475996/130475996.html#good+demographic+questions+for+surveys

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004992.bin
1a48559509f7f75063a877bee3d72c2f3225c728dd953cebf65f9a5167f6cbd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4992 16036 bytes
font_01_sfnt_off00006129.bin
14f3b850e3da9c6cff4459261a32a2d762cbdb5ba18a08b2834bd7bd12c5d7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6129 9240 bytes

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