Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc988dd91fbe0a6d…

MALICIOUS

PDF

35.9 KB Created: 2020-08-30 22:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5327d124aaba7bbdda0508d818cd89ea SHA-1: 705609408b4d6b38695dd25600184cae82314e39 SHA-256: fc988dd91fbe0a6dec6d81355102c4e78c578ddea642c4bbd6b79aa2edd405ad
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 to other PDF documents, a technique often used for SEO poisoning or to obscure malicious redirects. One of these links, 'https://ttraff.com/wix?keyword=osawari+island+alchemy+combinations', is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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.com/wix?keyword=osawari+island+alchemy+combinations
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/35974458747.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/kapezokenitexajebotawonuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/chlamydia_trachomatis_tratamiento.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3e060cd61624e13923302f728930d53.pdf
    • https://static.usrfiles.com/ugd/8d57bd_f7fa4390e5084391a27ccc08220ef406.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4a1241efb154e09aea32844d3733e53.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b631993c6244b6d967a658805543a77.pdf
    • https://static.usrfiles.com/ugd/c8a981_3475d6d406754a838f9f53cf953cbe05.pdf
    • https://static.usrfiles.com/ugd/3eed2b_52b89dc94b134f26be1808486eb83358.pdf
    • https://static.usrfiles.com/ugd/97aff7_1723ec152c364f689d37c6c58cc8168f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bc0d0d172014da7ab1951e5b53d763d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3faba924c5144b0899bbc2da6b149b6.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e29c1580c904fb5afabe02370fb5898.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_off00004d71.bin
da5d72c62c731e3988db0ab1685ff97b8c012da85f45879c3c982c5096413d6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D71 5540 bytes
font_01_sfnt_off00006022.bin
9bab0e18c781f3d4ac73ffee71aec8cf9fd7d70009dbd50f8843c7b5f7d514df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 10268 bytes

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