Malicious PDF — malware analysis report

Static analysis result for SHA-256 a792c25c0ceadb9f…

MALICIOUS

PDF

36.0 KB Created: 2020-08-23 03:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f9f71c6d3fcfd9d3332393f666d0f3d SHA-1: 719aa728460c5aee04f6e05b62c60920c76ad2cd SHA-256: a792c25c0ceadb9f9b22d0ef6a2dedb343599af6ac303563754d9db044b7e882
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text fragments including the malicious URL and keywords like 'Acura carplay android', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=acura+carplay+android
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.pdf
    • http://files.bestficoscore.com/uploads/1/3/2/7/132740670/fawiweda.pdf
    • http://files.axxonkorea.com/uploads/1/3/1/3/131379732/pefiverafilo_jasivewakobiwov_timevi_lojemomuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/26938922684.pdf
    • https://cdn.shopify.com/s/files/1/0447/0338/3708/files/cannabinoids_for_medical_use_a_systematic_review_and_meta_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/sofipesosorevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/mebufu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/55813072601.pdf
    • https://cdn.shopify.com/s/files/1/0437/1385/5643/files/80347073991.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/38160764539.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/rodamugalejapodojiruner.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/carrier_edge_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/34672301811.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15501301831.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_off00004dca.bin
b23819887241e0fbdc4b37dd378591647f1cb4bc4f71b0c2db81b60b6d30b2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCA 4980 bytes
font_01_sfnt_off00005ecf.bin
1e8c51d2f0896e55a14fd5eb356f76eaea9aa3983d29c4a60fbaace643f6d754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 10340 bytes

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