Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb66420875a997f8…

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 19:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02405ec8816aa7f3d45b90982b815b35 SHA-1: 6a6a3198cc89fe6fe47012ecf526f406212bdfb0 SHA-256: eb66420875a997f839a0c869c1292cb164d4aff3d07557c2c5588a9e9feac986
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a useful document, but the primary link redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL https://ttraff.cc/pify?keyword=tally+accounting+software+shortcut+keys+pdf is part of a known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests this is a tactic to distribute malicious content through a large number of links. The ML_NYX_PDF_MALICIOUS score of 0.999991 strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=tally+accounting+software+shortcut+keys+pdf
    • http://files.swiftcreekguitars.com/uploads/1/3/1/3/131380745/duvulaviget.pdf
    • http://files.cornershopclub.com/uploads/1/3/1/4/131454986/fijese.pdf
    • http://files.doubleglazingwolverhampton.net/uploads/1/3/0/8/130813055/vujebodedimunosoruwe.pdf
    • http://files.modesttransitions.com/uploads/1/3/1/3/131380995/e18abf3.pdf
    • http://files.cornershopclub.com/uploads/1/3/1/4/1314549
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/46008375143.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/22616881566.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/pujigefufoketozeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0430/1373/4563/files/how_to_get_draenor_flying.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/vikepofuduwonenami.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/jisujakesiniziwafuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/kizunevejeboli.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/importance_of_crop_rotation_in_agriculture.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/66936372231.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_off0000668a.bin
67bb5dcd7c81b895cf76d17dbf904ef0d31c3b207a9149d64e617e6e499937b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5624 bytes
font_01_sfnt_off000079c0.bin
2275ec6aa8f5bf35adfdab249a6ddcf82ddaaae13df5c2f8ec48259bb91fe24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 9956 bytes

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