Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc16b4f6300d322d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-22 17:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3701f24b0c06eaea14775b76af11c1b SHA-1: 5aab6e50c7beef7d76db02db5f4d3c633bf2f5e7 SHA-256: bc16b4f6300d322dbf859f5caaa7b258a380b1f6da3e28bebf48cb370d0b48d7
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as an 'annual return report malaysia'. It also features a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=annual+return+report+malaysia
    • http://fulovova.cindykollerphotography.com/uploads/1/3/1/4/131437871/1798451.pdf
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/17212294149.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/3964107680.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/cartina_turistica_puglia.pdf
    • https://cdn.shopify.com/s/files/1/0448/5431/3122/files/types_of_occupational_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6604/files/25965639479.pdf
    • https://cdn.shopify.com/s/files/1/0440/5572/4197/files/wiley_addiction_treatment_planner.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/81587777703.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/install_scikit_learn.pdf
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/40115154493.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/api_console_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/enter_usb_bluetooth_dongle_driver_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/11194480204.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005edf.bin
36f9d5ef2978219ed42da47ed6f5b471aa2ebc7518b6c3702ccb7d74811e4823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 3548 bytes
font_01_sfnt_off00006b94.bin
5d8df620c56723658ce6fec841c6322a3af26a4120d899a8248886498cdd00f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 4940 bytes
font_02_sfnt_off00007c3e.bin
d30962545e0f0140803dfeb48677a5fbfc4da9994ba00bb3bf51ce1105a6ec31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 9948 bytes
font_03_sfnt_off00009e4a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4A 4324 bytes

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