Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc0a864e5a0ab94…

MALICIOUS

PDF

38.8 KB Created: 2020-08-30 23:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2a1fd1d1e824f67cd9ccd7c0f85b35 SHA-1: 48c68bced9bd23c5b8c28d2315fda354a447788b SHA-256: cfc0a864e5a0ab942ffa43fc6db7ee7ead529083ab892efe1084b5d49b7528b9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/wix?keyword=dvd+xpress+dx2+driver`. This URL is presented in the document body, disguised as a driver download. The PDF also contains a large number of embedded links to other PDFs, a technique often used for SEO poisoning or to obscure malicious intent. The primary malicious URL is the most critical IOC.

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/wix?keyword=dvd+xpress+dx2+driver
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/57269085382.pdf
    • https://cdn.shopify.com/s/files/1/0437/0907/1513/files/adverbs_of_frequency_exercises_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/71818612048.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/lusakufesulur.pdf
    • https://static.usrfiles.com/ugd/bd5c68_c85a800d825c405d8b74179bec28dbc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_734f0021fc9e4a6093b275344b3cafcb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/75133306789.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/26339068798.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gozoba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5826/5238/files/sanuzejerabelomubakogisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/nikon_d7000.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/vickers_hydraulic_pump_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6247/7479/files/85160237166.pdf
    • https://cdn.shopify.com/s/files/1/0433/6618/7176/files/yamaha_ttr_125_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/49073669214.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_off00005b89.bin
01385289bbe2b42cbcefc9756ef555c98b10103acfd5f504dd4f2abb1116b43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B89 4968 bytes
font_01_sfnt_off00006c9c.bin
ced30ece947b8099610e6c236a77bb25c8b261016e8713226bf8b474f1d8394b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 10012 bytes

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