Malicious PDF — malware analysis report

Static analysis result for SHA-256 79570716b91b7c8d…

MALICIOUS

PDF

52.8 KB Created: 2020-08-06 21:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 908034dc50caa4fbc91d8ab131f4149e SHA-1: be5b873f32910b2c8bbedf7583c7c6c5dc0700a0 SHA-256: 79570716b91b7c8d2f67e932a097e88771390c45cc9b91d393f56f030dcb253b
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.com, which is likely intended to lead the user to a malicious site. The document also contains a mass external PDF link farm, with many links pointing to shopify.com, likely for SEO manipulation to improve the redirector's ranking. The embedded link in the document body, 'https://ttraff.com/pify?keyword=byomkesh+bakshi+books+pdf', is the primary indicator of malicious intent.

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=byomkesh+bakshi+books+pdf
    • http://files.rmxelite.com/uploads/1/3/1/3/131398008/gesulapugas.pdf
    • http://files.allanlacoursiere.com/uploads/1/3/2/6/132681544/5cfecaacbf0ff0a.pdf
    • http://nimefem.atayloredapproach.com/uploads/1/3/0/7/130775432/nujewunopilosefefuno.pdf
    • http://files.fccmorehead.org/uploads/1/3/2/6/132682663/rixiregek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/35097274343.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/90591578987.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/great_writing_3_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/union_budget_2020_19_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/gtd_david_allen.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/82220885706.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/50490515288.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0921/files/36443965300.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/30987023207.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/zixodixomisarefidosowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/88389631442.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/87356237348.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_off00007ab7.bin
ff4cfc9581d5d20bf2647bdf8fe7eab91e3fed8f82e0efae33ea979348dd2f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB7 5508 bytes
font_01_sfnt_off00008d53.bin
a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D53 1936 bytes
font_02_sfnt_off00009698.bin
f475b90ede0a69d97d31934d0c140c77e247dd0e1f1b5429ca47daf734b92352
pdf-font-stream PDF embedded font (sfnt) at offset 0x9698 15168 bytes