Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f895cd847614fed…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 20:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d679c8349acca63a6b501b3d0e6bced SHA-1: 364ad336329c5c3c9f96c8231dcb8cfba77ba817 SHA-256: 7f895cd847614fed90d46bf2b5eea5e7250375435b7ca1357e236cd50991ce9c
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, disguised as a 'standard u-bolt size chart'. This heuristic, combined with the presence of numerous other links pointing to external PDF documents, suggests a link farm or redirection attack. The document body contains garbled text but the malicious URL is clearly visible.

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/wix?keyword=standard+u-bolt+size+chart
    • https://static.usrfiles.com/ugd/e3ed1f_2eb70b2a4fba4ecca6744b063645f091.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad56bf27fbdd4f50aa7d76d2fb30a763.pdf
    • https://static.usrfiles.com/ugd/b8c837_a83a1824b4b04dc091bd4d169c678eb0.pdf
    • https://static.usrfiles.com/ugd/353d00_97cb77c5fed14796824658e4a4eb53da.pdf
    • https://static.usrfiles.com/ugd/b8c837_8702141a2b3b453281fcd20b986c8425.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/alexander_and_the_terrible_horrible_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/memorial_service_template_editable.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/57570132303.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/67015311584.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/78226594762.pdf
    • https://static.usrfiles.com/ugd/0511f5_0e6ac1396ca046988a9c91bf63625898.pdf
    • https://static.usrfiles.com/ugd/e2c250_89636b3cba874e43813790d3e77e31d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fbf20b3a4684a5ba762c53a39b1ad9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e71cea722cf4ea78dcae4d1e74e6b91.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_off00005ae5.bin
04e290a4a8c8b2fb9a45984c40201d08f4e24531cad6654ed7db84ebb2b27c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE5 5232 bytes
font_01_sfnt_off00006ca0.bin
8f3ebe10c86633b42f8a6d424f540e6df4e079ead54edd354bf0d5f8313b83cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA0 13576 bytes
font_02_sfnt_off0000969d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969D 4324 bytes

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