Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e40badba6b3aeb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 15:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51e54a5c99c752b834acffb089ffb12a SHA-1: d93e1d7b92932b9b1665311531ee448cca378faa SHA-256: a5e40badba6b3aeb5b71b0c7fde1b39c44c3034f802d499c530e748a7424afa8
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=kaffe+1668+new+york+ny'. This indicates the document is designed to lure users to a potentially harmful website. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting a broad distribution or SEO poisoning attempt. No scripts were extracted, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.me/wix?keyword=kaffe+1668+new+york+ny
    • https://static.usrfiles.com/ugd/b8c837_b34cfbf19d4b4a6b836b37eb174c7943.pdf
    • https://static.usrfiles.com/ugd/c1108c_5d4a057282a94cf5b86bf60639307c19.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f9da9d239c04b9490fcdb421235720b.pdf
    • https://static.usrfiles.com/ugd/b8c837_15da4e260a7745cea480e065b662638a.pdf
    • https://static.usrfiles.com/ugd/b8c837_73da8329b14d4ff7b43e116734a409de.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_89572559332c4a8298b1f700b83e0fb2.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/8642290543.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/39305826587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/sidereus_nuncius_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/11672476284.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_off000060c6.bin
dac4198ca44055708059c32fb221aa94aff3ab0c4b794eec3f5478aca149ce63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C6 5176 bytes
font_01_sfnt_off00007298.bin
15eb41056f81858d0e538db1c1b93f3d9912ae1cffafcd4a244fe4ba19c3ea4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 10580 bytes

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