Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17b59e7e0ef524d…

MALICIOUS

PDF

73.5 KB Created: 2020-08-13 21:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f47b95c2aa90a769907e6878221f744 SHA-1: 39d2050e03156050b1eb762e9576168e9af56437 SHA-256: c17b59e7e0ef524d8b6c65319d724b55f6229018788102a6ae318d45487e895e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a malicious redirector link pointing to 'ttraff.com', disguised with a keyword related to Medicaid. It also functions as a link farm, hosting numerous external PDF links, many of which are hosted on Shopify. The presence of a visible LOLBin command execution instruction suggests an attempt to execute further malicious code. The document body, though heavily obfuscated, contains the same lure text as the malicious URL.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.com/pify?keyword=income+guidelines+for+medicaid+in+arkansas
    • http://files.lindaqphotography.com/uploads/1/3/0/8/130814636/571235.pdf
    • http://files.wardragons.info/uploads/1/3/1/8/131871704/sepogome.pdf
    • http://files.alexnewcombe.com/uploads/1/3/1/4/131407655/sifadilun-lewosefebu-botofegujurud-papap.pdf
    • http://files.jnathan.net/uploads/1/3/0/8/130874278/9096663.pdf
    • http://visetipi.biopharm-medicine.com/uploads/1/3/1/0/131070420/3453444.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/bikirobob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/91244390920.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/state_biot_savart_law.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/vemoxomazepisuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/sanuxuvesazo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/71497313610.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/powershell_change_directory.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/american_english_vs_british_english_vocabulary_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/49481825721.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/calculus_for_gate.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/action_research_topics_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/fawatika.pdf
    • https://cdn.shopify.com/s/files/1/0435/7688/5416/files/autoit_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/antimicrobial_agents_definition.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_off0000dd94.bin
f57888907db662cdee43168cb2421563b93c48d62754c22c438f369150010862		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5344 bytes
font_01_sfnt_off0000ef9e.bin
7f6cba6b64013dc421bf7f26f9f749ddb8a98b742616ed8fe74ce55b09d88ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 11392 bytes

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