Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb851c52c53e108…

MALICIOUS

PDF

42.3 KB Created: 2020-07-08 12:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 767d7023d52944f26a6958120a42f57b SHA-1: 4c5e6c666b2376c521aa038ad3a28c0cdba8b001 SHA-256: ecb851c52c53e108a62c0dc5f97b2162558f2fc868b261d6524dc731110858cb
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=ccell%20palm%20manual'. The document body also contains urgency language, reinforcing the lure. The presence of numerous PDF links suggests a campaign focused on distributing further malicious content or phishing pages.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/wb?keyword=ccell%20palm%20manual
    • http://files.vontoba.com/uploads/1/3/1/4/131438741/zipunux.pdf
    • http://files.jpsousanhsband.com/uploads/1/3/0/8/130873987/lemolakasivoroxal.pdf
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdf
    • http://files.dynoprotech.com/uploads/1/3/0/9/130969242/givanimimo-basupepizebes-nefamukidu.pdf
    • http://files.shannondrhodes.com/uploads/1/3/0/8/130873907/1944747.pdf
    • http://files.linguisticanalysistools.org/uploads/1/3/2/6/132695572/7628227.pdf
    • http://files.stepharchers.co.uk/uploads/1/3/1/4/131406391/2116521.pdf
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdf
    • https://bubodurazize.files.wordpress.com/2020/06/mowamunejepixuxotufesav.pdf
    • https://nimodinuti111298458.files.wordpress.com/2020/06/46310764772.pdf
    • https://noginamopak.files.wordpress.com/2020/07/77554420799.pdf
    • https://pimuzuvaduz.files.wordpress.com/2020/06/pikejimuzojefigukirud.pdf
    • https://wosexazori.files.wordpress.com/2020/06/fufinixikotarepamonanikot.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_off00006b65.bin
eb46260a65b1b03f02e5663c6b9ded03f395468827f7ce4318afa17964bbcf01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 4472 bytes
font_01_sfnt_off00007a75.bin
097f73a3ec300f6fbf90b2973a2dafe3b1d25b8843cad619058af5a9bf331bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A75 10120 bytes

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