Malicious PDF — malware analysis report

Static analysis result for SHA-256 484a8a3b9256b800…

MALICIOUS

PDF

70.7 KB Created: 2020-09-05 01:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70257832d092be3190d9580a60af24fa SHA-1: 2ad6646ec327396f321b64883b505d328fd464b2 SHA-256: 484a8a3b9256b80092de99aa740434195c01bb45ebbad3166a0c3ac16739b8ef
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. No scripts were extracted from this sample.

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=ac3+file+format
    • https://static.usrfiles.com/ugd/8ba634_b6eef0aa37994587939fd9f984348d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2c4bba5127a4c2b93fd32c817457492.pdf
    • https://static.usrfiles.com/ugd/64d889_336d33b69f8e4bf9a26fcaf153d0ac6f.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/83730283661.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/28954655526.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/67793871409.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_a376b8b82fb6430a90b499ade36230ff.pdf
    • https://static.usrfiles.com/ugd/4542d9_ea61d8f516934207bd8a4e9680077de5.pdf
    • https://static.usrfiles.com/ugd/b6aaa0_6289489197fa4b65bf3e76b75fa0a996.pdf
    • https://static.usrfiles.com/ugd/724bd4_e28fead4ce5d427c8cb6d80433e0e604.pdf
    • https://static.usrfiles.com/ugd/30e015_43200c6196144b35ab5a65b4922189e8.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_off0000ccf9.bin
cca3eab44c931d3038eed978e313bb68a52753ed85a7ff02aad5094bb1c1f1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF9 4684 bytes
font_01_sfnt_off0000dcd0.bin
e638a8da8912493f62323d673ded429ac4355928d2849a3f3043d402699d0cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 10388 bytes
font_02_sfnt_off00010036.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 4324 bytes

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