Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3c7bad1ae5173c…

MALICIOUS

PDF

40.3 KB Created: 2020-08-08 01:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 484e7dc11509d0fc0b56550525ca5674 SHA-1: 6a10e0fad73174fd7ea14cc384f760799bd9c783 SHA-256: 8b3c7bad1ae5173c44e0ac2bc40cbe48c374f0d40248b6d9da4b25a58b3f91db
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a book. The document body also contains numerous links to various Shopify-hosted PDFs, likely part of a link farm to improve search engine ranking for malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=essential+idioms+in+english+robert+j+dixson+pdf, which is designed to redirect the user to further malicious content.

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=essential+idioms+in+english+robert+j+dixson+pdf
    • http://files.ambatilab.com/uploads/1/3/1/3/131381237/3e8eb3.pdf
    • http://files.donnalewisblack.com/uploads/1/3/1/4/131453871/pimagurigagi-pelelabikubutuv.pdf
    • http://files.mountainlakewinery.com/uploads/1/3/1/3/131384674/tevutawe.pdf
    • http://files.ottesonpsych.com/uploads/1/3/0/7/130739415/83638.pdf
    • http://files.emiliaskincare.com/uploads/1/3/1/3/131382595/sujedemot-lofixilijowi-tevetogagajuka-lodejogug.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/84395827735.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/vurulogomave.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/weribetoxodiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/gomunumurubatulaxubotit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/futoduroleg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/47032072567.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/16113722802.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/28564602158.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/91281626560.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/dumisawademubanativi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/1733251111.pdf
    • https://cdn.shopify.com/s/files/1/0441/3833/2312/files/giwos.pdf
    • https://cdn.shopify.com/s/files/1/0434/6760/4128/files/vaxebezalerekamuvozazegi.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_off00005fc8.bin
3dca38e89189bc8d068feebe3e247ddf492fc66edb319747abc343b29eb0f0af
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC8 5696 bytes
font_01_sfnt_off0000730e.bin
36a47be9acb9fe12a035d454ff873c99a8ab5386d941ef7a0d8d2f669d704fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x730E 9640 bytes