Malicious PDF — malware analysis report

Static analysis result for SHA-256 b411c604df311f2c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-09 06:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3036242cc0c21333cb42a70683326fc SHA-1: b56cd648b84e0cffad13991db0964a498c99d367 SHA-256: b411c604df311f2c0e1db46e0467847cc1cbd075837c444b3348a42e3a6a6902
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a document about accounting ratios. This link is part of a link farm, suggesting an attempt to distribute malicious content or engage in SEO abuse. The presence of a 'download button' lure further supports the deceptive nature of the document.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=accounting+ratios+questions+and+answers+pdf
    • http://files.yurigiorguanime.com/uploads/1/3/2/6/132682607/7cb490.pdf
    • http://fazolas.kkbuteau.com/uploads/1/3/2/6/132680813/kabure.pdf
    • http://files.gonzalesmastergardeners.org/uploads/1/3/1/4/131437702/disufisewugaza-wokunidutileb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/207884777.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4005/files/resto_druid_best_in_slot.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/zifugerezojejelepapovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/canada_s_wonderland_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/application_letter_for_teachers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/how_to_use_airshou.pdf
    • https://cdn.shopify.com/s/files/1/0440/1630/4278/files/bash_string_comparison.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/nfl_fantasy_draft_kit.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/wosevuvosovubirodesu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/48608158435.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudogezemolajefenupil.pdf
    • https://cdn.shopify.com/s/files/1/0446/3765/1107/files/passport_application_form_child.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_off00006402.bin
639c439a7c0f144e04d2d1c34d4008e1f148986fb9e5f1b4d83b984be709ae4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6402 5500 bytes
font_01_sfnt_off000076d4.bin
c8c333531f13d2efee7c4437f38ef89b2b2c29f50b935aead60b058b69241492
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D4 10332 bytes