Malicious PDF — malware analysis report

Static analysis result for SHA-256 e221bbe2c2ae24f8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 03:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e276471651f7f2af43bb5a925ff7aaf SHA-1: cf18d4c5bcded008e749c51cb90984cc77800066 SHA-256: e221bbe2c2ae24f80d141846f0d3bfc9e69de2422d197dc85fc87b916f014d2c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=c+programming+language+in+tamil+pdf', is designed to redirect users. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection scheme to distribute further malicious content.

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=c+programming+language+in+tamil+pdf
    • http://files.kristamasonyogafitness.com/uploads/1/3/1/6/131606289/7238120.pdf
    • http://fugukome.customcoshirts.com/uploads/1/3/0/8/130813747/dae4088e318db37.pdf
    • http://files.boiselawncare.net/uploads/1/3/2/7/132712093/5578319.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/xiropitugasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/37396729448.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/magic_workstation_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/sumilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/98365034702.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/62431919830.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/mijesolodavozemusubalem.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5831/files/34467432864.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/55340623329.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/31850487506.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.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_off000076ee.bin
db6da0463cb173d1b5a3e8785f3a21ab5dbcdeb5690932ed3f2ed33b6a177be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EE 5088 bytes
font_01_sfnt_off00008826.bin
183f0b2724b25136fe37dc371e5a99c867a1cda3f2e8636fe53362d7e7006e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8826 11824 bytes

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