Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd3f3d563eb3751…

MALICIOUS

PDF

32.8 KB Created: 2020-08-14 13:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71e323c609bef07291858f0e5d4969c SHA-1: c6508d121da414c56ce503298863ec862fa1579c SHA-256: afd3f3d563eb37516ccba452ef94ffabf49fcc0c43a1762cc5b85aca407278c3
150 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'catering business card template' and the malicious URL, suggesting a lure. The presence of numerous external PDF links further supports the link farm heuristic. No scripts were extracted from this sample.

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.ru/pify?keyword=catering+business+card+template+vector
    • http://files.polygonall.com/uploads/1/3/0/7/130775171/mufusaravunefos.pdf
    • http://files.coolyearschoolgear.com/uploads/1/3/1/4/131408537/jabev.pdf
    • http://files.malcolmmcewan.com/uploads/1/3/1/3/131398125/jiderubivegepusel.pdf
    • http://menofineb.maltingsstructures.com/uploads/1/3/0/7/130775818/1180863.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/35019149466.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/41513639948.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/86058997811.pdf
    • https://cdn.shopify.com/s/files/1/0432/1027/7025/files/action_replay_dsi_software.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/just_words_pc_game.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/neumonia_por_chlamydophila_pneumoniae.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89709194360.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/zuvebojatokejazimax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/20014949791.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/71111308532.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/zozugive.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0520/files/study_abroad_packing_list.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_off00004615.bin
6957ff47f23d1d35f9e371cfd1794f74f14df59c231fed6864974c3036546ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4615 5500 bytes
font_01_sfnt_off000058b3.bin
6047743ddc2cdd99a4c3356b33a5042d672e3a13be9da7f1708f71b98b1383b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B3 8648 bytes

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