Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2343ed7038effc…

MALICIOUS

PDF

43.9 KB Created: 2020-08-03 21:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc7e8ad9ed9f7a6ec3397e459bb38992 SHA-1: 27e37446968b48fe030d0bcf197a9a79b988b8f2 SHA-256: df2343ed7038effca0278bdbc5f3c43e306e092cfb7657b4d109ae8573e44b5e
150 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.ru, which is designed to lead users to malicious content. The document body, though partially corrupted, includes the same URL and a seemingly innocuous topic about pregnancy books, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector or improve SEO for malicious content. No scripts were extracted, but the primary attack vector appears to be the malicious redirector link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=good+books+to+read+during+pregnancy+for+baby+pdf
    • http://files.chesniehearthealth.com/uploads/1/3/0/9/130968934/7980972.pdf
    • http://files.communitycouncilma.org/uploads/1/3/1/3/131382032/zudasafi-jajomeponiwe-dekeg-damen.pdf
    • http://vujoke.niwotcounseling.org/uploads/1/3/1/8/131856907/vujos.pdf
    • http://files.menonlyadventures.com/uploads/1/3/0/8/130814043/zomejuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/mugataximegexuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/31374695882.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/totitijupipepoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/zujoditedapokasivujipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/facebook_login_logout_button_php.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/dofiripuredudovata.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/5784558569.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/19903250278.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/xinesujomuludajipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/xufowitovutukubejuvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/91046675102.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/didifawogokitagefinod.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_off00006b32.bin
a761c490f1313e9c2e9a3fca97ea36741ff8d9134829a5188ce9f2eef8bfa4d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B32 5628 bytes
font_01_sfnt_off00007e74.bin
c790e7a107a66fa82117b0729cbf326906e00da7cd77a7f5bc2b5c7a8c9628e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 10600 bytes