Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba936c5ed1f2651…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 04:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4200c61aea403c5f656d05bcffdcfb9a SHA-1: 72f09be7021effaecb70258148c00068cc749c13 SHA-256: 1ba936c5ed1f265106fcea7803fa95b801d41afc4296d447fb4ff27a66596487
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, 'https://ttraff.ru/pify?keyword=nonparametric+statistical+methods+2nd+edition+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Nonparametric statistical methods 2nd edition pdf', suggesting a lure to trick users into clicking the malicious links under the guise of academic content.

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/pify?keyword=nonparametric+statistical+methods+2nd+edition+pdf
    • http://files.beckerpark.com/uploads/1/3/0/7/130738666/radebobobe.pdf
    • http://files.paintyourheartsout.com/uploads/1/3/0/7/130738700/bd2de04c6c25a.pdf
    • http://files.princessinthemirror.net/uploads/1/3/0/7/130738553/e13102bb.pdf
    • http://files.thewriteblend.com/uploads/1/3/0/9/130969148/zajonurukusuzen-dopuladal-lelekajox.pdf
    • http://files.revolutionpapers.com/uploads/1/3/1/4/131413905/d8515c4.pdf
    • http://files.thewriteblend.com/uploads/1/3/0/9/1
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/23819970757.pdf
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/49236054884.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/70952947484.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/17892714870.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/digexubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/94850249212.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/lagusiber.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/modexoboxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/sanizesozisikosawodiv.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_off000073f6.bin
3db14cc6a0ba8fbbfcc62122e84ebed508a3dd19b50dcd17fc7cd56f35e66a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5284 bytes
font_01_sfnt_off000085b7.bin
34d90d734b95c49cd6c4342b0629ee594dccab5fa04d139efb04683c4b6b2dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 9732 bytes

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