Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c3a74e413f2659…

MALICIOUS

PDF

49.8 KB Created: 2020-09-06 16:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d140662a20822d95d0422c077678044 SHA-1: bab9796ac6ff80bf0264a8a335788960dd8d8107 SHA-256: 28c3a74e413f2659066ee428ca95f00c9eaf0b01a5d6e53bffd1c7b60bea46db
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links, 'https://ttraff.link/wix?keyword=via+email+formal+letter', is flagged as malicious. The document body, though heavily obfuscated, contains this same URL and appears to be a lure, presenting itself as a formal email letter. The presence of numerous PDF links suggests an attempt to distribute or redirect to further malicious content.

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=via+email+formal+letter
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/47235734262.pdf
    • https://cdn.shopify.com/s/files/1/0463/3378/8317/files/tafebuvijemepugus.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/24272663939.pdf
    • https://static.usrfiles.com/ugd/c1108c_6fa03e05b462478ab105235b37470952.pdf
    • https://static.usrfiles.com/ugd/b7ed05_df614ea63fad4dadb5ac43faf2399ba1.pdf
    • https://static.usrfiles.com/ugd/b8c837_65b630379da3491ab4784af37e4b5ad0.pdf
    • https://static.usrfiles.com/ugd/0779a3_407014253c814024bedc2eae721c62e0.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_8fad2ac91eb7402b9cc070182ffc8a53.pdf
    • https://static.usrfiles.com/ugd/48bf55_9be5353e344943efa682c1af98844329.pdf
    • https://static.usrfiles.com/ugd/b1b16e_54c8b70258ec417e88df92dbfa64101e.pdf
    • https://static.usrfiles.com/ugd/f4de5e_ac7d35f154d54f09ad96d00b86f17f8e.pdf
    • https://static.usrfiles.com/ugd/3de8a6_c78119b6614a4e09a851692f433646ee.pdf
    • https://static.usrfiles.com/ugd/24853a_65bd576a9ae2479a865008b3aefb9c12.pdf
    • https://static.usrfiles.com/ugd/3c2e2e_392e03f52dee426b915e6e31a3b58297.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb0899de63194060909ada918b713a7c.pdf
    • https://static.usrfiles.com/ugd/c20ea7_3b1e2f1eca144fa5aa3de035369a2e08.pdf
    • https://static.usrfiles.com/ugd/5ed537_1e9be139aaf04ae6ba7e2e5b410ae666.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_off00008569.bin
7714921a0387b062ae119e7b733c75ce95335607d31f6d8278a5dfe0b5e24a6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8569 4700 bytes
font_01_sfnt_off00009554.bin
7bb75eefe2440da2e6fc0dd53643513079c56e57ef4a3e6fd8758eb7f9e328e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9554 10768 bytes

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