Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a6c37465e52bfb…

MALICIOUS

PDF

49.0 KB Created: 2020-07-29 16:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e995d3e66242384892437093944bed SHA-1: a380140c743b3a0c8aacbeabffd463be9c635939 SHA-256: 22a6c37465e52bfbf6f688ca496d4038f318b9170ffe7ca2d99b5220e8e27729
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of these indicators suggests the PDF is designed to lure users to malicious sites.

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.cc/pify?keyword=quantum+theory+and+electronic+structure+of+atoms+pdf
    • http://files.uuchurchofthelakes.org/uploads/1/3/2/6/132682852/xatojubux-jibagi-logida-dunizudebip.pdf
    • http://files.bodyprochiropractic.com/uploads/1/3/1/1/131163643/fulig.pdf
    • http://files.bitsoffreedom.org/uploads/1/3/0/9/130969915/9862131.pdf
    • http://files.thehillchristianfellowship.com/uploads/1/3/1/4/131409017/nazavip.pdf
    • http://files.suburbanmaven.com/uploads/1/3/0/7/130738548/110998.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/76515999237.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/vitafowo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/58122718895.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/1862534055.pdf
    • https://cdn.shopify.com/s/files/1/0428/1987/9079/files/kajixaxap.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/gubevorukikekorufi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/84730511749.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/77980585726.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7350/files/murukerex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/2648659628.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/nudufaselanaxuzufevegib.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_off00007ff0.bin
20457474c9accfb80541b8e742c03e3b462eb4ced076a1d45e73aef3999a8282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 5440 bytes
font_01_sfnt_off00009244.bin
1a528db456e65fe9a77aea779420b78cef8fbb7023ede08b7631881aeaa829fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9244 10488 bytes

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