Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61bf38cad0904e1…

MALICIOUS

PDF

49.9 KB Created: 2020-08-14 05:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b693355a0a89c916df6619b3cb23b5ab SHA-1: 309e3a79743bd072d834487266599727bdadc038 SHA-256: c61bf38cad0904e1f5ae120ce01071b06bdfaec83c38409ca78b75243e960b6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body also explicitly instructs the user to copy and paste content into a shell, which, combined with the malicious redirector, strongly suggests an attempt to trick the user into downloading and executing a second-stage payload. The primary malicious URL identified is https://ttraff.cc/pify?keyword=windows+10+enterprise+bootable+usb.

Heuristics 4

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=windows+10+enterprise+bootable+usb
    • http://files.glammoms.us/uploads/1/3/1/4/131438741/devuku.pdf
    • http://files.proridersaddlesllc.com/uploads/1/3/1/8/131856904/zasufefutilokabu.pdf
    • http://files.nathanielpicardbusky.com/uploads/1/3/1/3/131379099/3377395.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/64705905152.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/robert_tisserand_essential_oil_safety.pdf
    • https://cdn.shopify.com/s/files/1/0438/0822/7490/files/merotapodidogiburo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/jedegefaroxafulogutut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/nemamulede.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/fobuzulakovimatixa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/dmv_florida_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/17544880151.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/28446507591.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/11077229847.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/33208833131.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f4c.bin
e5ec7e1e9925c1cf44bc5b9bf7e39928a43f31e924f283da7dc375339877a6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 5392 bytes
font_01_sfnt_off000081be.bin
a5f780847e273c417e4e8a18ed4b9d4daa2439ad0cf631d3b66b0d82e3021cd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 10144 bytes
font_02_sfnt_off0000a4a6.bin
fbeccb1482ee56052ed809ec6cb7dfbc577d51b9212e43fffabc93e29761b6bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A6 16248 bytes