Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc1add82c964591…

MALICIOUS

PDF

43.7 KB Created: 2020-08-02 08:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3e802d3b51afba4af7ea617d6565cd SHA-1: 7b0b9ff8f019b53f0c9bc43515fb29eacb255f33 SHA-256: 9cc1add82c964591722ffe0020ee25644a4087f4d3736c530cad165b2c2b6c63
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of a link farm designed to distribute malicious content. The document body, though heavily obfuscated, contains the text 'Otis- lennon school ability test' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links further indicates a link farm strategy. No scripts were extracted, and the primary malicious activity observed is redirection to a potentially harmful site.

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=otis-+lennon+school+ability+test
    • http://files.cgcatogo.com/uploads/1/3/0/9/130969801/rotoginibib-zubofemaf.pdf
    • http://files.wisconsindronehomes.com/uploads/1/3/1/3/131380308/jizudamituwabupanupa.pdf
    • http://files.walkingstick.org/uploads/1/3/1/8/131857655/6713709.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/44984899690.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/3411114336.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/leditoxudonex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/fusimabepebukujene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/wedoxanugif.pdf
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/govugazofovibotapisudup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0437/9367/8497/files/78617582946.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/66318976306.pdf
    • https://cdn.shopify.com/s/files/1/0433/1995/1513/files/24799130701.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_off00006d0b.bin
ce02f0289a0b59454d7dbc8ab43a9a30eb8ca2a647b7f0d8e2c806f636f51764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0B 5092 bytes
font_01_sfnt_off00007e64.bin
a352f76f23b3f745e85c57b1bf9a94ba1c5359998ec3a3ab3e3b59cd7c07d315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E64 10524 bytes

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