Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd338cfdc9d3696…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 20:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61df7b9fe7ce95c8e3fc23ed8096dc35 SHA-1: 7fe10a059c69acc921768b3269404d14f021d510 SHA-256: 1fd338cfdc9d3696e15918e2e950ff31b6ee2bcbf0d5c05c22f111cf0c87e33a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary URL, 'https://ttraff.ru/pify?keyword=speed+test+website+performance', is identified as a malicious redirector. The document body is heavily obfuscated and contains a large number of embedded URLs, many pointing to Shopify domains, but one also points to a suspicious domain 'tafubi.norwoodcafe.com'. The overall structure suggests a link farm designed to lead users to malicious content.

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/pify?keyword=speed+test+website+performance
    • http://tafubi.norwoodcafe.com/uploads/1/3/1/4/131407164/tufumevejise_janenuwonarigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/36163605095.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9847/files/college_application_essay_heading_format_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/jakavevekit.pdf
    • https://cdn.shopify.com/s/files/1/0437/3220/5722/files/jenibar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9319/files/lepuluxavoxoresimovaguwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6776/7970/files/38240097609.pdf
    • https://cdn.shopify.com/s/files/1/0440/9019/6133/files/canucks_schedule_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/zixitexajozobu.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_off00006578.bin
ba6b74acb76a907dfef005d7d688ef482c931d849be730bac17d6f1bf8e10a40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 5392 bytes
font_01_sfnt_off000077b6.bin
825b4e83d3cad14e9073f98c38202f1e5483e76e83f4e90b0b2be3c5ab5368a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B6 10088 bytes
font_02_sfnt_off00009a3e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3E 4324 bytes

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