Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef8d95b72dffa0d…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 07:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 493adbddbdfa025470104a3bbec3fafc SHA-1: dc466df648ba56fc8d069b1d515da8ed4b5f6abe SHA-256: aef8d95b72dffa0dc4d6b4996b8b1db1ebbcdffff3b4523f044d7aa21e6fec4f
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=cabin%20crew%20interview%20pdf'. Another critical heuristic identified a large number of embedded PDF links, suggesting a link farm. The document body, though heavily obfuscated, contains the same URL and a benign Shopify URL, reinforcing the lure. The primary attack pattern involves redirecting the user to malicious infrastructure.

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/wb?keyword=cabin%20crew%20interview%20pdf
    • http://fadafi.anatomy-demystified.com/uploads/1/3/1/4/131406436/114d2a86.pdf
    • http://files.scaeop.org/uploads/1/3/2/8/132816036/firuw.pdf
    • http://files.meowlinda.ca/uploads/1/3/0/8/130813643/dorafaz.pdf
    • http://files.craigleacapetown.com/uploads/1/3/1/3/131383823/4715212.pdf
    • http://files.authormariantee.com/uploads/1/3/0/8/130874162/bolil-nubavise.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7861/files/5187689539.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/73241237001.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/nigonedugixuzukifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/mogokusase.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/61586948068.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/12552279540.pdf
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/principles_of_behavior_modification.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/pulofiveruzurupogariwunid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3564/files/nuzewefeviditodesikaw.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_off000067c1.bin
e3d4a7a80ff75d99504713edf75f0306f87c105da5d74ff3010a6afef2f41a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5136 bytes
font_01_sfnt_off0000795a.bin
0a323b86c5201335f1cdb2ea70a3ae3468e2b6de04b9a8a729ec23077d6b39fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 9632 bytes

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