Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49c63df781d5b5b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-16 01:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59adbc768a0fc075e01cca3398f4eb66 SHA-1: 735baf8f52172bb30144ead5c981ef48d79b1b81 SHA-256: b49c63df781d5b5b0602f5d97b6a02be9dbd9f53d62e00d74961bfb07ee7b145
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=rapid+appraisal+methods+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0427/7148/0742/files/sujomojawefeganaxiw.pdf'. The document body, though heavily obfuscated, contains references to the appraisal methods keyword and the malicious URL, suggesting a lure to a malicious site.

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=rapid+appraisal+methods+pdf
    • http://files.todos-juntos.net/uploads/1/3/2/6/132681916/1647965.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/sujomojawefeganaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/les_analyses_de_sang.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/you_deserve_it_future.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/puzepiwipetokabizakonafus.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/90439874341.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/sovafopigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/7333762428.pdf
    • https://cdn.shopify.com/s/files/1/0445/6860/8927/files/echo_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/mebedoxavago.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/zedunaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/84015626053.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_off00006701.bin
30b3cc54aa26d06d7a1a2a8ca05becb284bcba09fe70316438404a0dfc564ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6701 5288 bytes
font_01_sfnt_off000078d2.bin
2156332ec70fc47455c9a78a4bc46c4eb7c0df3253a38c3d779b5038eb0a8c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D2 10276 bytes

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