Malicious PDF — malware analysis report

Static analysis result for SHA-256 b482a8373d45661e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 15:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3ab2b53cb5df3a4d60aeea35cde056 SHA-1: f830bdad180824d1278879170f999f55c1d6ec15 SHA-256: b482a8373d45661e1394577db0de8ef71464c396fbd262528bfb9690fd82bc85
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that directs to a known malicious redirector, disguised with a plausible lure related to employee timesheets. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, many of which are hosted on Shopify. The primary malicious link is https://ttraff.ru/pify?keyword=city+of+seattle+employee+self+service+timesheet, which is likely used to initiate a further malicious download or redirect.

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/pify?keyword=city+of+seattle+employee+self+service+timesheet
    • http://files.charliescrusaders.org/uploads/1/3/0/9/130968963/tasuvepaxut.pdf
    • http://petekifu.fliondess.com/uploads/1/3/0/7/130738848/2356251.pdf
    • http://files.highlanderfootball.com/uploads/1/3/0/7/130775853/1c11a0d.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/ziburivuwaxetufuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/vebelubajewufidujalunib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7030/0061/files/mejanowefarulogila.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/58786336642.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/76394912831.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/72535521076.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/11097443081.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/belize_passport_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/64813116231.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_off000062b1.bin
2dc8d982fbccd4a99d1e14ad9e36c5e9564a11c6df20a7160339e0ab64506235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5324 bytes
font_01_sfnt_off000074b6.bin
43bcfe8ef59172db9e232fa43f730dd423fa774f17e743f309a642b6ec902d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B6 12948 bytes

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