Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67feed8f4489787…

MALICIOUS

PDF

39.0 KB Created: 2020-09-05 07:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bece33e26fd221e80463fbaa74fdb05 SHA-1: 3b6dd33b72f5ea56701136957326a23986a59810 SHA-256: a67feed8f4489787d12a255e11a12866fd4ccee214245dec197f000a4886bbda
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.me/wix?keyword=cloudformation+template+sections, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links hosted on cdn.shopify.com. The primary attack pattern appears to be a link farm designed to redirect users to malicious content or manipulate search engine results.

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.me/wix?keyword=cloudformation+template+sections
    • https://static.usrfiles.com/ugd/ab922d_1c8ee9a515ca42678657d22f54f62311.pdf
    • https://static.usrfiles.com/ugd/94e5ef_6e77cc42d31848c4ad4602d4aefc6abb.pdf
    • https://static.usrfiles.com/ugd/6cfc61_d0f4553549654230a387d0efbb523632.pdf
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/wumejav.pdf
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/juwotetowowinesojetit.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/unholy_dk_talents.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/39875861127.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/rooted_bluestacks_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/11970269022.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/51551854699.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/tewobopuduwidowage.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/57206971537.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_off00005bd5.bin
2c475e7d3c23053c60515a4d2bf83e47ffc3360d8f033ce61170904dc97c5f29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD5 5208 bytes
font_01_sfnt_off00006d6a.bin
25bb5292799f929509651f5c64dfc648d079b4f9167f852f02c4c5cf8e049b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6A 10012 bytes

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