Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8f5924306e698f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-06 21:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3cd3ea77332219578180244a5412399 SHA-1: dcb44700a8f1f6ea7f6691c6946cc65c131fc6fa SHA-256: 9d8f5924306e698fe8a0e562625964a2e78723b49311230dba58558ad23c2389
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=read%20pdf%20table%20data%20in%20python'. This indicates a phishing or social engineering attempt, likely to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL and numerous other links, suggesting a link farm or SEO poisoning tactic. 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/wb?keyword=read%20pdf%20table%20data%20in%20python
    • http://files.triciarose.com/uploads/1/3/1/8/131872178/mopuxefagu.pdf
    • http://files.arkitechairdesign.co.uk/uploads/1/3/2/7/132740880/supufugif-rusomiwoli-vufexebotumot-vopelironukona.pdf
    • http://files.cockerspanielclubofga.net/uploads/1/3/1/6/131607467/8224603.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/25508378861.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/autocad_dwg_file_converter_to.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7933/files/4064334891.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/51449974418.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/jovisimixejafanop.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/37788165149.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/stewart_calculus_early_vectors.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/english_speaking_course_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/pexufezuburalonekiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/26528572416.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/5138658896.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/25770058645.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_off000063e9.bin
d3008c673f853410cf2bd49887bb99e430a5687c8d56ce465ceff9a999fbd725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E9 5104 bytes
font_01_sfnt_off00007550.bin
87279c310eed46ec87140e0767c834fa27494eb97c596c3b70af852d786196c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 13860 bytes

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