Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c7a937586390dc…

MALICIOUS

PDF

40.9 KB Created: 2020-08-22 15:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 525e55496f32d9aa7ffaa48dd17fdf70 SHA-1: e24bec08831aa7bb71cee87f7577dddba51fe243 SHA-256: 87c7a937586390dc60044922d389fb20097bbaca6ed51fca9b9d85115ffb4f49
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to `ttraff.com`. This indicates a link farm designed to obscure the ultimate destination, which is identified as a malicious redirector. The document body itself contains garbled text and the application name 'wkhtmltopdf', suggesting it was programmatically generated to host these links.

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.com/pify?keyword=overboard+2018+parent+guide
    • http://fifunu.natashabangertmotion.com/uploads/1/3/1/4/131409090/5858487.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/vodagekulawopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/15523744087.pdf
    • https://cdn.shopify.com/s/files/1/0431/2789/8268/files/instagram_images_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3660/files/fenosotisox.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/rifobal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/kapuxewazun.pdf
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/wosomulikabiterenomo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/18136259281.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/2090204712.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/blaine_county_police_department_lspdfr.pdf
    • https://cdn.shopify.com/s/files/1/0452/5208/3869/files/nigav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/c230_kompressor_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/35486033678.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_off00005fef.bin
c88a55898afedef63fb5e115d4ef340a2f613632cf5eee8bf53853ad04bcb3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 5664 bytes
font_01_sfnt_off0000734c.bin
c65b93bdfbe57cc772225c001bb8720c631ae2fedd1349fce8f316e7c1454f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 10376 bytes

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