Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9b8cb698e4fb77…

MALICIOUS

PDF

84.0 KB Created: 2020-07-23 09:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f44c7cfc12043d3b4163a0a4fd3704a SHA-1: d9ab283a228170739fa88ae78b0e79424f853fed SHA-256: aa9b8cb698e4fb77feb7f84cbe17a04c76ec762434cf7f52a8a68f7116a03670
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm and a redirector. One of the primary links points to a known malicious redirector. The document body is heavily obfuscated and appears to be largely junk data, suggesting the primary purpose is to host these links.

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=liberty+bell+information+facts
    • http://files.walkaboutjesus.com/uploads/1/3/1/3/131381720/14f92a.pdf
    • http://files.texasbestbrushes.com/uploads/1/3/2/7/132740519/mosuvurixaluzojonud.pdf
    • http://files.ucelitebasketball.com/uploads/1/3/1/6/131636651/xujipifulagomosajow.pdf
    • http://files.lynneschall.com/uploads/1/3/0/9/130969494/1269362.pdf
    • http://files.harrydavidltd.ca/uploads/1/3/1/3/131398142/c89b409381f0c6.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/94994672169.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/zozimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2484/1890/files/dopigumulip.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/13640449104.pdf
    • https://cdn.shopify.com/s/files/1/0433/2699/6633/files/xijejofedajemono.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/19224623341.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/77462270885.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/4002474809.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/kidupoloxet.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/batoperutibapefimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/zoxojog.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/nikivip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/tudifikomoluvanil.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/68614915187.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_off00010c3f.bin
c3f45a5f0a20abdeae43a8ca7c07c5665a78a517c02b846b0c1ed679d8e01cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3F 4996 bytes
font_01_sfnt_off00011d1c.bin
25bfaf98b28574822c81d489cb73c2e4ad99e996202be34e07d1cf326c173cde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1C 10888 bytes

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