Malicious PDF — malware analysis report

Static analysis result for SHA-256 34af69572eef5218…

MALICIOUS

PDF

35.7 KB Created: 2020-07-07 11:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 493dd078d9aecd03d64ba5de66d40206 SHA-1: 29f696bd17e1ecb61099dc3cea0a4c9f1570ac56 SHA-256: 34af69572eef5218228879d03efb4682d25ba3cb8088df3f6a2f1dca3cd555d3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'https://ttraff.com/wb?keyword=has%20have%20had%20worksheet%20for%20class%202#has+have+had+worksheet+for+class+2', which is identified as a malicious redirector. The document body text, while containing educational keywords, is likely a lure to encourage users to click these links. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.com/wb?keyword=has%20have%20had%20worksheet%20for%20class%202#has+have+had+worksheet+for+class+2
    • http://files.mackeiganmarketing.com/uploads/1/3/1/4/131452732/sodopafesub.pdf
    • http://files.bigtrecreation.com/uploads/1/3/1/3/131379612/fasezojozixuf.pdf
    • http://files.mnjeweler.com/uploads/1/3/1/4/131437740/fomurogoxufirofaliz.pdf
    • http://files.explorestanton.com/uploads/1/3/1/4/131453216/6741733.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://files.striba.net/uploads/1/3/1/3/131380413/9297027.pdf
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • https://rejurezuge.files.wordpress.com/2020/06/15041789483.pdf
    • https://koropezanuxe.files.wordpress.com/2020/06/9775238005.pdf
    • https://zinisarov424395058.files.wordpress.com/2020/07/zutesigunibunene.pdf
    • https://nolotigeso.files.wordpress.com/2020/06/58832620353.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004df1.bin
f76234508ca89ec98a6d3d2cbaccd24441554ae4fc9c650eb05d633345888205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF1 5052 bytes
font_01_sfnt_off00005f45.bin
3eb0367cbe5276a1014da809873ffdb30e27711d026b162dbe4b2d073aa9eba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 10204 bytes

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