Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0f6a1aaf4eed14…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 19:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b74a997cb6aae383446427b9b007edec SHA-1: 5ca949a45e9741a0c3cc977257cb5bba60a0a7b7 SHA-256: cb0f6a1aaf4eed14d42fecffff8d669141bc33457b86b2102ae9416f4f3a8387
150 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=o+que+%25C3%25A9+capitalismo+pdf. The document body, though heavily obfuscated, contains references to URLs hosted on Shopify and other domains, suggesting a broad distribution effort. The ML classifier strongly flagged this PDF as malicious.

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=o+que+%25C3%25A9+capitalismo+pdf
    • http://zoguw.topchoiceinspectors.com/uploads/1/3/0/7/130739664/b0e0a1af57.pdf
    • http://pekaxin.the-blessedseed.com/uploads/1/3/1/6/131606407/wikokulivapu.pdf
    • http://files.urbanvolleyballclub.com/uploads/1/3/0/7/130776519/pugumugu-dirugeb-gesubuvadeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/witedimidenafug.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0888/files/xiwewosa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/nilumopimamasupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/15201850132.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/illicit_financial_flows_from_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/zajexumawetidinukezul.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/wazarudenagunofonerew.pdf
    • https://cdn.shopify.com/s/files/1/0444/3032/7975/files/addictive_behaviors_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/rrb_1099_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/sedasojomoto.pdf
    • https://cdn.shopify.com/s/files/1/0455/5816/9765/files/af_988_leave_request.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061cd.bin
31cafcc27394d8c04a7829ea75a0c1768ecb520d740f614859fac91fe236741c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CD 5276 bytes
font_01_sfnt_off00007383.bin
2391fd1baac29a0c220ddc4a7b499ffc6401b701e01125d79988d08eeb85bb5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7383 12000 bytes
font_02_sfnt_off000097da.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DA 4324 bytes

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