Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a54385eaab9d07f…

MALICIOUS

PDF

49.8 KB Created: 2020-08-31 00:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57030ccb1a6742bfe761c648eab8269c SHA-1: 880d55680811f3693c2dfd70ddc9c33e6ebde26a SHA-256: 9a54385eaab9d07f4cb31a1180e47e5993e4deef8f5d428eaa91cfdc7634c709
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=pdfbox+convert+html+to+pdf+example'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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.ru/wix?keyword=pdfbox+convert+html+to+pdf+example
    • https://static.usrfiles.com/ugd/fd3290_1ac08503a2444084b5eca4058c8704bd.pdf
    • https://static.usrfiles.com/ugd/173616_7f4848f8d3b548caae1280ad7366eda7.pdf
    • https://static.usrfiles.com/ugd/469aea_6b1941740dd14230a209727843ed4ff2.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_ef4d63c779a24f0283f6bc59399c8aa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d9ae27a821481aa156e7006b923e4a.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/42825714947.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/53148004507.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/pusojejapugalire.pdf
    • https://cdn.shopify.com/s/files/1/0437/0186/2554/files/byzantine_fault_tolerance_blockchain.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/campbell_biology_9th_edition.pdf
    • https://static.usrfiles.com/ugd/41a0b6_7a43394027af4683861bca0296fce8b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f8ae46630a4b688afbf3f941bb323a.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_off00007034.bin
b98d3087f5fc0d838f4022d9d1bc0d531554d74368bc535600b634b0873e3c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7034 5224 bytes
font_01_sfnt_off000081c4.bin
9ea08e7701ffe7d1f03f96b723ece79b0fc2f966358708a750eb8e17b3907d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C4 13412 bytes
font_02_sfnt_off0000ac84.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC84 4324 bytes

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