Malicious PDF — malware analysis report

Static analysis result for SHA-256 476e1df8ff85bb5b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 12:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 464128d16fe74c344b9ed88656b15474 SHA-1: bc451dae1e28c66d0ad7ab160f62c938e08f06f6 SHA-256: 476e1df8ff85bb5b63e367e20b3edd91ab92c650a61723debb93d63d359cc2bf
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document also features a large number of embedded links to various PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted from this sample, but the presence of the malicious redirector and the link farm indicates a social engineering attempt to lure users to a harmful 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.cc/pify?keyword=spectrophotometric+experiment+lab+report
    • http://files.keithlundmark.com/uploads/1/3/0/9/130969370/2350077.pdf
    • http://panuxufi.southwestpaddlecompany.com/uploads/1/3/2/3/132303035/5861421.pdf
    • http://files.rmtappinportfolio.com/uploads/1/3/0/8/130813821/c974707c4a.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/teposawigibu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9109/1875/files/76553251180.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/paneguxusifogofenifada.pdf
    • https://cdn.shopify.com/s/files/1/0447/4686/6839/files/59771056629.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/28164065071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/vibujefolonu.pdf
    • https://cdn.shopify.com/s/files/1/0452/2527/9648/files/tcs_aptitude_test_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/vovakidesegovojerapanigiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/fobipekaridekira.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/vebenowukawulew.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/jeduwifo.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_off00006346.bin
438fd15a2064f99e8083e2453cdcbedb6c54bcda8d4764de2a53eef51186fa11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 5304 bytes
font_01_sfnt_off00007528.bin
f5e49e3615f4dbe28367a40573ac2219fae264e0e49e5ec7c0e01712962c5ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 10212 bytes

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