Malicious PDF — malware analysis report

Static analysis result for SHA-256 37185fabe3b9df0d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 09:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d0b78f5edc1d4a7c582ce3cc2f895be SHA-1: f0e6d1b06e94f969d9957b5cbfc16f837a683b39 SHA-256: 37185fabe3b9df0d6bd72d1c048bf8e04ad3ec9410720122061917c8c663897e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior, embedding a large number of external links, with the primary malicious link being https://ttraff.ru/wix?keyword=how+to+stay+alive+in+the+woods. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to a malicious site disguised as a document. No scripts were extracted from this sample.

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=how+to+stay+alive+in+the+woods
    • https://cdn.shopify.com/s/files/1/0436/2086/0067/files/80145412379.pdf
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/63293710832.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/kejonunilijozapibijavasuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7963/files/fasorowiraxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/john_deere_4320_manual.pdf
    • https://cdn.shopify.com/s/files/1/0449/5494/3647/files/lagu_bts_chicken_noodle_soup_matikiri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/latest_ios_macbook_pro.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/87822775014.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/no_in_other_languages.pdf
    • https://static.usrfiles.com/ugd/b8c837_0527b986961c445b9b59675309c63cd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fcb4b6c1bb64482b9a0c250dc60e03b.pdf
    • https://static.usrfiles.com/ugd/6846fe_90b70f56de1f433ca8e72f15f6f6a4c2.pdf
    • https://static.usrfiles.com/ugd/aef5b7_149bccb5f9b44fce9820e02f0249d24f.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_off00006117.bin
cfaf9818e48237c19eeeb75407b38433b886f6d6c40ec8307b5935d32a2f6f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 5032 bytes
font_01_sfnt_off00007244.bin
a3e744d24b535081d3f42b81832fc3b956f4606b9d325c561a385b382e5b30fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 10612 bytes

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