Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d5a1df8a1472d7…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 23:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 965a7acb33991d181d1a75aadad414f5 SHA-1: 767a617ca74237f73f259a7c63ec0f553633e2d1 SHA-256: a6d5a1df8a1472d72be51e98629a92da4614fff54908e6f3c3b8b686041eac03
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as an 'office building plan drawing pdf' to lure users. The primary link redirects to `https://ttraff.ru/pify?keyword=office+building+plan+drawing+pdf`, which is identified as a malicious redirector. The document body is heavily obfuscated and contains binary data, but the presence of the malicious redirector and the link farm heuristic strongly indicate a phishing or redirection attempt.

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.ru/pify?keyword=office+building+plan+drawing+pdf
    • http://tefofu.operationhood.org/uploads/1/3/1/3/131381675/b3c8d302.pdf
    • http://files.tlcwoodcraftsllc.com/uploads/1/3/1/3/131379530/46b5ce027e6acd.pdf
    • http://gekim.doctorbewell.com/uploads/1/3/1/4/131453674/wabivibotakitom-zagitagosagixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/dewoseseko.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/72492934908.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/84641591148.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/tofelonazizolipowudimoduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9721/0532/files/66437559243.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/11386751672.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/buwalipelunutabomipadubax.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/30096647696.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/24480194059.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3516/files/37551002755.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_off00006c73.bin
c08465ea9f7038edffd72ddfab1d3e0abe92e86163707b7908ce3305c56c5600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 5404 bytes
font_01_sfnt_off00007ee8.bin
7d54c534ef3301879b1ac03b24febf389606fbae4b6a061fbf9c053eb3f6868a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE8 10040 bytes

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