Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8265750c54ca41d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 00:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab34f7571f2cd7cefcc7395d48110296 SHA-1: 51884dfb4a114ad0393fed7c26e1c693aeb61255 SHA-256: d8265750c54ca41d819eb06914cd85f47a1981b5993682d82e4f63b5d734aef0
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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=mazda+3+android+auto+not+working
    • http://mejad.healingstreammedia.com/uploads/1/3/1/3/131398008/5860967.pdf
    • http://zekonizu.monicanicolaides.com/uploads/1/3/1/8/131871864/5578889f2627.pdf
    • http://files.missioneventrentals.com/uploads/1/3/2/7/132740564/4578599.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/3990482104.pdf
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/soxetujogomisurol.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/5261083887.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/hana_database_development_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/76237678816.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/82710261094.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/781006232.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/vofekewiredekowozarufag.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/russian_roulette_rihanna_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/5809764476.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/principles_of_managerial_finance_6th_edition.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_off00005efe.bin
9c192b6c0a0d379950d5027b89d3a6a22918bc28a4cc73e9af91a911ac9d2e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFE 5160 bytes
font_01_sfnt_off000070c1.bin
1c1d1f91ffa7991e26e87ac8d3e416180bed57f1c3092d270513ee31da0d6df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C1 10060 bytes

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