Malicious PDF — malware analysis report

Static analysis result for SHA-256 4901abfb265dc24b…

MALICIOUS

PDF

38.1 KB Created: 2020-08-21 01:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a393cbd30d1807e4528ad7fcef4e5848 SHA-1: 8c092c30433790ece2b1214bcb89ca746322adb9 SHA-256: 4901abfb265dc24bbdd2c746ba8cc42f4d47a46692435b4904e8a141f4388b62
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially harmful content through these extensive link farms.

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=lorax+mustache+template+pdf
    • http://pefufo.dafniantonarou.com/uploads/1/3/2/7/132712323/sigitosa.pdf
    • http://files.nmctkd.com/uploads/1/3/0/8/130814397/tubabix.pdf
    • http://files.fpzasurfcoast.org/uploads/1/3/1/4/131437984/f38b7a951498d.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/cabinet_mantri_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/fundamentals_of_multinational_finance_moffett.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/fizajesube.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/swing_trading_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/pandas_functions_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0454/5744/0926/files/scientific_approach_to_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/25132817713.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/82026275540.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/banker_s_algorithm_solved_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/summoners_war_fire_homunculus_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/97673957129.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_off0000562e.bin
566469ad68e68eeca8bd1826459c86c2807dc80a4af203c6420919660113f7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x562E 5404 bytes
font_01_sfnt_off0000686c.bin
5bc3b32188f8c0a4794d471da70a5ff189028d2b2c870a454994fd2b9325e2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686C 10396 bytes

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