Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9c7ab45c798b20…

MALICIOUS

PDF

48.9 KB Created: 2020-08-06 12:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68dc2080f960127fe798213c85d866c8 SHA-1: 14fbb7846285a5a4508ed5299bb3e023326bf732 SHA-256: 2b9c7ab45c798b20dd68997ed4bc48a5bb0743eb10fa00daa4169c91c13208af
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a mass external PDF link farm, with the primary URL hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'Basel 1 accord pdf' and mentions the authoring application 'wkhtmltopdf', indicating it was likely generated programmatically to host these links.

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=basel+1+accord+pdf
    • http://files.paqu.org/uploads/1/3/1/8/131871894/vibofukupu_ruzererijolibij.pdf
    • http://files.literidetree.com/uploads/1/3/1/4/131453990/e6f044.pdf
    • http://files.masslibaz.org/uploads/1/3/1/4/131454316/e0c42.pdf
    • http://files.rememberwhenphotos.org/uploads/1/3/1/3/131384638/soroso.pdf
    • http://files.leonschainsawpartsandrepair.com/uploads/1/3/2/6/132696558/fc1355ae9111.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/86937824752.pdf
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/tubevabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11149497500.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/mozarusamagufozagegibodab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/65037189393.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/mowura.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/tedanumamof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/kozojebulox.pdf
    • https://cdn.shopify.com/s/files/1/0432/0844/2020/files/international_accounting_standards_39.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/70925108467.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/airland_battle_doctrine.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_off000078ca.bin
f261c7745f65db5f95921b355e493387287e1b24773b5383de8c622dc2788268
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 5248 bytes
font_01_sfnt_off00008aba.bin
7dd3a3f30a053048d4abfc46da6acf2ae9d308e17510823d57012bd00756b55e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABA 13696 bytes