Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea52786a36d9479…

MALICIOUS

PDF

37.4 KB Created: 2020-08-22 14:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bb6317359145717dd64e162f55bf13 SHA-1: b307004f944ad983690d44b481b07c93f3186320 SHA-256: 3ea52786a36d9479e22b1fe08e4e3c5da73040e6583c90362088f0cd017c351e
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a URL associated with known malicious infrastructure. The document body, though heavily obfuscated, contains text fragments suggesting a lure for 'powerpoint free template', which aligns with the malicious redirector's purpose. The PDF also contains a large number of embedded links, many pointing to Shopify domains, likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=powerpoint+free+template
    • http://files.cheryldespathy.com/uploads/1/3/0/7/130775953/1924051.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/xorezekuwodov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/65552434791.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/14990282944.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/fabelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/25992004411.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/angularjs_1_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0443/1101/9676/files/aptitude_questions_and_answers_with_explanation_for_rrb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/xavoturujadas.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/sirozaxelis.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_off00005768.bin
3d5d68b13896953094b2322a4e69f083446e24f712743d09db427c80b652a80f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5768 4960 bytes
font_01_sfnt_off00006839.bin
b04897937ffc3fad49b36c4ee974c8bdf96651ea65e80e989c261de3253fa66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 9652 bytes

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