Malicious PDF — malware analysis report

Static analysis result for SHA-256 511d648183172d9c…

MALICIOUS

PDF

34.6 KB Created: 2020-08-10 01:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57717136c983a02d844584e31e947103 SHA-1: 3b41eb67e58ac4ed85d170efc3f0a56ff6b8388e SHA-256: 511d648183172d9c623ef0ed7e4093e600e845f54c62d81c307d7740a38cafb2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links pointing to other PDFs, some hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=biomagnetismo+pdf+download. The document body contains garbled text but includes the malicious URL and keywords related to downloading PDFs, suggesting a lure for SEO manipulation or further malware distribution.

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=biomagnetismo+pdf+download
    • http://files.ketooozy.com/uploads/1/3/2/6/132695615/pamalogipufujaz-milikokuzolun-regozel.pdf
    • http://files.robynveal.com/uploads/1/3/0/8/130874477/nasosit_siberimuwukabol.pdf
    • http://files.salonelitemn.com/uploads/1/3/1/3/131398497/ca7212.pdf
    • http://files.madridistasatl.com/uploads/1/3/1/6/131606360/jolonukowe_goxoxaferi_rimanotaxave_zidotepuwe.pdf
    • http://files.waveformedtraining.com/uploads/1/3/1/4/131437037/1494082.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/63842972596.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/15966562830.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/12122288293.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/13290304527.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/injective_function.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/titapotexovugerumoso.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/domujoluketaze.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/technical_interview_questions_for_ece_freshers_with_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/14649349909.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/52846891377.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_off00004ae0.bin
4e2cd8529260b9c5b960589d0577f83f6d22d2529256bbfb8614fb21fe5f4761		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE0 5404 bytes
font_01_sfnt_off00005d4b.bin
f2f729ffc3c972b3791fadb6548d78cf7452f7b3992201706b155156278750c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4B 9540 bytes

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