Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c1a2bc383dc3654…

MALICIOUS

PDF

35.5 KB Created: 2020-08-18 17:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dca45bf2789405b8196c63bdecf9d7e3 SHA-1: c8efd22157cb146ff3caf517048e1caffe238eaa SHA-256: 3c1a2bc383dc36546b4e52c9f79843b919d0027c760e7ecfb3bf9f220bb02484
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to 'difficult airway society guidelines'. The presence of a download button heuristic further supports a social engineering attack vector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=difficult+airway+society+guidelines+ppt
    • http://files.hibbingbands.com/uploads/1/3/0/7/130739430/demaxetadujij.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/lubejulemanonafonal.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/architecting_cloud_computing_solutions_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/rekajunulediduka.pdf
    • https://cdn.shopify.com/s/files/1/0448/2826/2560/files/sakurai_modern_quantum_mechanics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/walking_up_stairs_sound_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/85683851134.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/gudomewuledoviripabove.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/lemomibomipur.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_off00004162.bin
c60d368a0661528ef93d9d898da11dcd3b5c1a26d708d4fe4c84e908971973f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4162 5400 bytes
font_01_sfnt_off000053df.bin
676a39482d1a80e81eeb2e20ee4484a4d2dc716a7b6cee606e3647cf0a91f060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53DF 9204 bytes
font_02_sfnt_off0000734b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 4324 bytes

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