Malicious PDF — malware analysis report

Static analysis result for SHA-256 d667cc86c1595bb6…

MALICIOUS

PDF

40.2 KB Created: 2020-08-06 18:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 434fd863b34e1e79b56e4f2e06ac8c54 SHA-1: 3230b8b4a7272f7e0fff5c09e8120d6aa5728278 SHA-256: d667cc86c1595bb6fbed8dffc439f7257d50dfcc6df8c473b66f940b548b887a
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a PDF download. The primary attack vector is likely social engineering via a deceptive link within the PDF.

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=adventurer+song+pdf
    • http://files.amussispainting.com/uploads/1/3/2/6/132695805/vemufojatov.pdf
    • http://files.jdstackroom.com/uploads/1/3/1/3/131383314/gipivasip_gobipuzazes.pdf
    • http://files.cismaths.co.uk/uploads/1/3/2/8/132814929/zijiru.pdf
    • http://files.nutritionworksri.com/uploads/1/3/0/7/130739288/642624.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0528/files/guxurebuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/evangelion_1._11_english_sub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/wirudubate.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/67544282370.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/99981511327.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/boost_library_c_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2270/files/kubabadutebixafogifefi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/88568052417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/76283009008.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_off000061da.bin
8e0e920df761fd27c341418345520a764d8054a76c90e84b752657b19955ff2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 5016 bytes
font_01_sfnt_off00007306.bin
4758794dacc0f5433133467d80bcaf89db915f01fa57a0b4a113b3791ec90b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 9828 bytes

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