Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b82a9f33e3b7b15…

MALICIOUS

PDF

54.8 KB Created: 2020-06-03 15:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc80b6cbbc62bd0a9cf69e334d6abec7 SHA-1: 35986d033ad92286273dd4a28123106f2cec8c2a SHA-256: 2b82a9f33e3b7b15352301cc734c097be5e55ca5f3352713571aa0e07b1ccdee
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/wp3?keyword=proctor+silex+18+quart+roaster+oven+manual#proctor+silex+18+quart+roaster+oven+manual`. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/wp3?keyword=proctor+silex+18+quart+roaster+oven+manual#proctor+silex+18+quart+roaster+oven+manual
    • http://coaction.us/uploads/1/3/0/5/130589156/zavul_diletimubasej_nosekilomif.pdf
    • http://connectedimpression.net/uploads/1/3/0/3/130313366/425775.pdf
    • http://thelocusgroup.com/uploads/1/3/0/6/130620934/fenikusibiwegek-tijafitesa.pdf
    • http://netherfieldinteriors.co.uk/uploads/1/3/0/9/130969966/jelilebupumepuvo.pdf
    • http://mail.aimcal.org/uploads/1/3/1/0/131070294/6493754.pdf
    • http://hazelcturner.co.uk/uploads/1/3/0/5/130588278/255590.pdf
    • http://zenithenergylimited.com.au/uploads/1/3/0/6/130605440/4912721.pdf
    • http://ethos-gr.com/uploads/1/3/1/0/131070842/4750161.pdf
    • http://thelocusgroup.com/uploads/
    • https://fokewofupipi.files.wordpress.com/2020/05/83549830586.pdf
    • https://ratesovepur.files.wordpress.com/2020/05/19325123916.pdf
    • https://xibojiwox.files.wordpress.com/2020/05/89743818586.pdf
    • https://wordpress.com/tos/
    • https://wordpress.com/dmca.html
    • https://wordpress.com/policy.html
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009de1.bin
c6dbd1d4334d63fbfe6ec7086632d6107d7ea9f5ed5a92e49384bfbe09baff14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE1 15748 bytes

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