Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0e419326dbb0cf…

MALICIOUS

PDF

73.0 KB Created: 2020-08-02 17:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b56ed31ef2b500b64adae753931505d8 SHA-1: f2fced2a2289a78eea00cb80b35a9045b78a5f19 SHA-256: cf0e419326dbb0cf84231739a08c4a3d95cb32b4b019c21a1669d4e528559f57
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a reference to the URL that triggered the malicious redirector heuristic. This suggests the primary intent is to lure the user to a malicious site via the embedded link.

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.com/pify?keyword=silberberg+chemistry+6th+edition+pdf
    • http://files.bowleylockcompany.com/uploads/1/3/1/4/131454521/c5a57aa4a.pdf
    • http://files.matthewpeckhamtenor.com/uploads/1/3/1/4/131408581/4497099.pdf
    • http://files.thymesquareca.com/uploads/1/3/1/3/131398177/bupumok-zofenasudu-busoke.pdf
    • http://files.triplethreatns.com/uploads/1/3/1/4/131406149/simupipuxugerel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/nutojonoje.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/price_action_trading_system.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/77697086653.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/47625746915.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/guvopewuxoradorizes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/wenur.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/fexifiboluzokusebat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5016/3609/files/overcharged_capacitor_wow.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/mazda_cx_9_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/xopewowevopejojagape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/99157901098.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_off0000d92b.bin
3e56bf80ed828ca8edaf5415402ba4bbf5e166c48dda9d589db1f06c6ca787b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 5856 bytes
font_01_sfnt_off0000ecfb.bin
0fa06310eeb5218a061b22eae7fdc76da9816f7217b5e0bd1381087f7b017be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 13008 bytes

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