Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0ab13101a09543…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 15:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fd2565b986fbded1e4792e8475dafde SHA-1: 663ef72cdc1f76ce6d20c443091d74dca56763a4 SHA-256: db0ab13101a09543f26a9935b2e2f412b535be0211518d907ccee1a23226f074
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, includes the title 'Aplicaciones de la hiperbola en la ingenieria' and the malicious URL, suggesting a lure to a malicious site. The heuristic firings confirm the presence of a malicious redirector link and a PDF link farm, indicating a probable SEO poisoning or content distribution attack.

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/wix?keyword=aplicaciones+de+la+hiperbola+en+la+ingenieria
    • https://cdn.shopify.com/s/files/1/0461/4334/0697/files/16830158563.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/egypt_pyramids_history_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0469/0775/2608/files/iaap_certified_administrative_profes.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/36960731012.pdf
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/relogio_big_ben_reforma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72966212333.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b52d1e7e444b0396e282047c1fca6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c11272175974cbb830bac88bda7f0e5.pdf
    • https://static.usrfiles.com/ugd/49be48_af9b2b4f10fb491b9a1c8e988aef2520.pdf
    • https://static.usrfiles.com/ugd/b8c837_9aa87b3a407b411b992e3fae46b32f23.pdf
    • https://static.usrfiles.com/ugd/cc089a_efc2cecd26264253872316eaaa815735.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/liberty_general_insurance_claim_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/72881237830.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/c_template_enable_if.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7669/files/molopujosujeduv.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_off000066ed.bin
9a3f4ca9a0940f82513b255892417b05df19d621b3198ed22819a4c3ed834115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 5464 bytes
font_01_sfnt_off0000796b.bin
e9ad3089ac4ac5ce94747be158e2bad3371f8b1f14288fe3c3e120425390edad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796B 10740 bytes

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