Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7e2a61fa3eb9e1…

MALICIOUS

PDF

59.4 KB Created: 2020-08-04 18:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff13742a974db9ab6ed7b5912e0b3666 SHA-1: 200187c6df41749105f450d3115b491a8fd17e4e SHA-256: 8c7e2a61fa3eb9e1f7e9e50d0a3112066822ae3e15d2015ae8ac1b8d91f34f4a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine rankings for malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=bsc+2nd+year+botany+notes+pdf+download', redirects to further content, suggesting a lure to download potentially malicious files disguised as academic notes. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=bsc+2nd+year+botany+notes+pdf+download
    • http://files.christepiscopalmusic.com/uploads/1/3/2/6/132682868/8889558.pdf
    • http://files.mhvbonline.org/uploads/1/3/2/6/132682615/kikali_xupaxozuxader_setavosud.pdf
    • http://files.thelifeatthehelm.com/uploads/1/3/1/4/131454770/6916031.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/fovifopokuvizisadasamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/vomumesumiwasemevajeki.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/30643634355.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/87809213420.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/naruto_volume_70.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5637/files/nokesupifuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/mefosatonekubirimi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6648/files/fenox.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/91392435182.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/93891740615.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bf1.bin
c0c5f614fb08aa37c351be2945bcedefa5d84472513734d39c44aeb340514cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 5404 bytes
font_01_sfnt_off00007e68.bin
35c0a746fcdf55e64f2ba55209f6a139fa5d4ea47dce36c63c78d1e6d66b29b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E68 3204 bytes
font_02_sfnt_off00008b59.bin
d97e055e11de589539a249dfdf9c15aca1e9caf4700104d1763a3a5d87d8f7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 2320 bytes
font_03_sfnt_off000095ab.bin
e64ef59555a4fab97f1e746420f01a296f5e2a3a5b25f732f508ce40bf3aafb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AB 12012 bytes
font_04_sfnt_off0000bc0a.bin
207faf14306426b668b87aba0c9d447b8ba40b67f0f7b18660ffa0d3c8132265		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0A 16224 bytes
font_05_sfnt_off0000d156.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 4324 bytes

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