Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e316c6f624cdaa…

MALICIOUS

PDF

47.6 KB Created: 2020-09-07 19:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c41b377ae1026f181714a7c9a6cce49b SHA-1: 41b2736bb35c7982e6837d7980df2296a8d5586b SHA-256: 42e316c6f624cdaae76ac7754fb44338cf69e34d3e6ada227b7a43467381aaaa
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise the malicious link. The presence of a link farm further indicates a malicious intent to distribute harmful content.

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.club/wix?keyword=how+to+repair+cracks+in+sheetrock
    • https://static.usrfiles.com/ugd/739437_31e45a6c5b3d488192bd21dd952dca59.pdf
    • https://static.usrfiles.com/ugd/1b7c00_f5b1643d562041c7998285ca92dd069f.pdf
    • https://static.usrfiles.com/ugd/b8c837_4acb61775aba4814b8ffe6d21a0a440a.pdf
    • https://cdn.shopify.com/s/files/1/0431/7206/9525/files/71515120095.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/50807591769.pdf
    • https://cdn.shopify.com/s/files/1/0462/3086/4021/files/visiroketuvabum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/ielts_speaking_makkar_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/89230050964.pdf
    • https://static.usrfiles.com/ugd/99965f_c4721040141e495a8fd506b850ccb4af.pdf
    • https://static.usrfiles.com/ugd/913720_43756165ae764427b4093ceb386cb50c.pdf
    • https://static.usrfiles.com/ugd/7dfe85_b3820497ba624915acb47422f21acdd6.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_0ddeda439b9d4f84b24922b2f55c085f.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_56dbea2fdd0b4e5e960e6a0aef205d83.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_off00007c87.bin
9871396dc296f52abea41c2be24ae947801a1c23376635dbb5869da89fea5ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 5108 bytes
font_01_sfnt_off00008def.bin
6e318d845d6482d85b6c9b5247ec55a96aae44d573d56dd3388c49162ff9e855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEF 10544 bytes

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