Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ab4286628bc775…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 12:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5398eee9633534a65635b52847b581af SHA-1: 0fde497f266e06b2618b1b7082be2167c7d621fc SHA-256: c6ab4286628bc77551f6cd9a0f71c83d92ca249cbf13ad7e626113348af6ac93
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent URL, https://ttraff.ru/pify?keyword=wavelet+transforms+and+their+applications+to+turbulence, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same malicious URL and several benign-looking Shopify URLs, indicating a lure to disguise the malicious intent. No scripts were extracted, but the primary attack pattern is the use of a link farm to hide a malicious redirector.

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=wavelet+transforms+and+their+applications+to+turbulence
    • http://files.tunajenga.com/uploads/1/3/1/3/131379398/dipodanizudigimitoxe.pdf
    • http://files.greaterheightsfellowship.org/uploads/1/3/1/6/131636737/3945625.pdf
    • http://files.dubayhomeinspections.com/uploads/1/3/1/4/131408465/4104766.pdf
    • http://files.nicholasmedoro.com/uploads/1/3/0/9/130969440/desagabozex.pdf
    • http://files.summerswebdesigns.com/uploads/1/3/1/8/131856200/7275730.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/27298518261.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3935/files/19772119797.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/96064996927.pdf
    • https://cdn.shopify.com/s/files/1/0435/9389/2008/files/54734897382.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/77490858020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/lipepoler.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/tobogebitaxib.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/versus_arthritis_back_exercises.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_off00006a0c.bin
4089bd88da3dfa96d8a6cd2a2ae7cfbf77f7c441f9e0c495112e91d1b10eb08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 5608 bytes
font_01_sfnt_off00007cf5.bin
7bc67db83df32287b3b88a381b03f67c92824b3e371754eacf2253463caab164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 10252 bytes

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