Malicious PDF — malware analysis report

Static analysis result for SHA-256 de190c84d6cb3e34…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 05:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c52ae67769559cda2e13b72972117e7 SHA-1: 262b0ef585ab01f473449c1a9915fdff4ced3320 SHA-256: de190c84d6cb3e34156a3d74f656c176ae1c69d1bdbec1e789f3b7c834e50325
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute malicious links broadly. The primary malicious IOC is the redirector URL.

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/wix?keyword=oblivion+elder+scrolls+soundtrack
    • https://static.usrfiles.com/ugd/0047a4_70688ab0af8a4766b797ca10fd733d23.pdf
    • https://static.usrfiles.com/ugd/704566_19ba0667a4e34224935a3c04f5cc319e.pdf
    • https://static.usrfiles.com/ugd/a382ee_9b3ff5bcd4384a8cb8f95b1620f3508a.pdf
    • https://static.usrfiles.com/ugd/a474dd_7da18895ca564df6a2ffdb91b45cbe59.pdf
    • https://static.usrfiles.com/ugd/1a89c8_10fad558b17e4dcb8b90eec7f6b78083.pdf
    • https://static.usrfiles.com/ugd/24853a_d3f23fc8dce84e039d76a92291f50dff.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/model_building_mathematical_programming.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/6791888901.pdf
    • https://static.usrfiles.com/ugd/6c032c_40664175dac84f3c9453121ba2e45bd5.pdf
    • https://static.usrfiles.com/ugd/3d0627_5586f62352a34967bf239a2bed4002cc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ebb.bin
d687448ebb6e449dd25fe5db87b12507a80e542b5f3aca68913c70b4486c8a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 5108 bytes
font_01_sfnt_off00007018.bin
a1128dcfd874aa014906d427cfa4f7e957677c6541c37ea420d8b9dcb2af6db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7018 10192 bytes
font_02_sfnt_off000092f6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F6 4324 bytes

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