Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd2c3d80f721422…

MALICIOUS

PDF

31.5 KB Created: 2020-09-15 21:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bece77233d6807e834be08c5454d6ab1 SHA-1: ecc9c752962848ffe8a8ce4351b991d2ae8a5881 SHA-256: abd2c3d80f7214224a1be6d135fc4887aca04f2ba604d62e993682368dc7a255
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or SEO poisoning tactic. One of the primary links directs to a known malicious redirector. The document body, though partially corrupted, contains the URL that is also present in the malicious redirector link, suggesting a lure to a malicious site disguised as a helpful document. No scripts were extracted from this sample.

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.link/pify?keyword=how+to+clean+corian+countertops+with+vinegar
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/goruge.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/xusunepenebareligifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/1999_chrysler_lhs_owners_manual.pdf
    • https://static.usrfiles.com/ugd/338562_b69019c1a1be4cae8e9f27b1daa17130.pdf
    • https://static.usrfiles.com/ugd/dcf311_81f9b7b90e5d4906a48a33e2b145ecfb.pdf
    • https://static.usrfiles.com/ugd/2a2e94_c494034053f547cdb0d999bdc863c392.pdf
    • https://static.usrfiles.com/ugd/0a84ca_3df412d5aa1f432dac38f0f208f37cbd.pdf
    • https://static.usrfiles.com/ugd/23e9be_ef21c57c8a06468386bddb18225935e8.pdf
    • https://static.usrfiles.com/ugd/a107db_4f9a970888e84d97b599da298c7aeb80.pdf
    • https://static.usrfiles.com/ugd/368de4_9f7ebb5d2bba47f9819bc74531e092b6.pdf
    • https://static.usrfiles.com/ugd/2074c9_101d10c2b79a401f83d5fc44a668b6ed.pdf
    • https://static.usrfiles.com/ugd/ef253e_09a86bc019d94e719862bee723ede2f5.pdf
    • https://static.usrfiles.com/ugd/ed2d23_b4b80549cb07499d8d0f033413e07be7.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_off000042c3.bin
5f92871fc002a44e7b11e76317e5dd3849bf71f8c0952c7cf16b50bd5a7fcd7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C3 5308 bytes
font_01_sfnt_off000054e6.bin
453dc73aa304c793cdf27b1cae30bda7cd2e6130e75bacd435136179d19b8694		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E6 8236 bytes

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