Malicious PDF — malware analysis report

Static analysis result for SHA-256 e733feb4e851cbed…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 04:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e57f2f0ed90ea5503e62171af309fc90 SHA-1: 2d9c4e464e63f8e5a7a850c2dcab4d5738f8e219 SHA-256: e733feb4e851cbed373d2c903673575e3b6653424a1831860df702e56e5d3f8d
130 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, a technique often used in SEO poisoning or link farm attacks. One of these links, https://ttraff.ru/wix?keyword=occupational+therapy+examination+rev, is identified as a known malicious redirector. While the document body is heavily obfuscated, the presence of this malicious link and the overall structure suggest an attempt to direct users to harmful content, potentially for further exploitation or malware delivery.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=occupational+therapy+examination+rev
    • https://static.usrfiles.com/ugd/32acb1_f5a2cc69ea224ac183ef406d20bcde7d.pdf
    • https://static.usrfiles.com/ugd/dd4472_4c1c36d6153b4b8cacfe0395e70f63d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_91e4cd5f6e8c49ab92b060318affabda.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4c0239534bb4abcb72b5598d5bb5b29.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbd27196c5c54090987e5dde8e6bc8a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e60a3f6fed6a4e6895ae32bda2748de4.pdf
    • https://static.usrfiles.com/ugd/e2c250_2b380fd68fb64d03a8f64238c6092b77.pdf
    • https://static.usrfiles.com/ugd/dd4472_fba6860dcdce417192823d56dc132eb8.pdf
    • https://cdn.shopify.com/s/files/1/0465/3626/1782/files/11943801773.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/26918597096.pdf
    • https://static.usrfiles.com/ugd/89064d_fce96f1f2a754a0998474b1795f9f43a.pdf
    • https://static.usrfiles.com/ugd/625844_99161daf0a7146e6a6d193ca0465c4b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_76426c93836a446db7be881da02757fc.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_off00006bee.bin
ba99e4e7ee9a8045db2365ef06a70e613a69e41606fe67acaecd086dafc82fd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 5252 bytes
font_01_sfnt_off00007da8.bin
c8b791d5d5a032107eb32fa0d4939d8a91f4e9d9b3781538b55b8f54e8688f55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA8 11088 bytes

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