Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20b0e0000a599bd…

MALICIOUS

PDF

52.6 KB Created: 2020-08-01 11:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e2dbdc6e0cd292e51bd4b439dd32a0f SHA-1: 742230512c942a1b959e3a51a06b4e685a61f108 SHA-256: c20b0e0000a599bdce9b5b1718c18da9094e0896d03e52156f26a0820e38bd55
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. This suggests a link farm or redirection tactic to obscure the final malicious destination. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for a calculus textbook. No scripts were extracted from this sample.

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=applied+calculus+7th+edition+pdf
    • http://files.matthewsabeyart.com/uploads/1/3/2/7/132712011/1a7ec0f1692d49.pdf
    • http://files.anne-watson.com/uploads/1/3/1/1/131164113/8863380.pdf
    • http://files.ncwiba.org.uk/uploads/1/3/0/7/130775953/jekoraliso.pdf
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/44154312830.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0440/5798/5189/files/silicon_valley_s04e01_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8188/files/sublime_text_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/5797/0329/files/63238744631.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/19498226865.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/90908491105.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/xogetawadaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8869/0844/files/66396004204.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/gujekozedafifawazalenu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/daralesiwikidaze.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/20990036111.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007268.bin
7f978e7cebe5742c11220dd77e54ba692138c03986bac34b9974785aebeb46bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 5216 bytes
font_01_sfnt_off00008430.bin
0cf2b87af8685ecf7455ddecad4fcb11a8664b1a8c67060caf482fe738c75408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8430 13856 bytes
font_02_sfnt_off0000b003.bin
06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB003 16132 bytes

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