Malicious PDF — malware analysis report

Static analysis result for SHA-256 3806ce92dd0b0b22…

MALICIOUS

PDF

60.3 KB Created: 2020-08-25 05:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04a8aaca0503bd6cb1a3c6d6fbd578a5 SHA-1: 57489cc5a5a4e6d6b533063e229a90caaec5648e SHA-256: 3806ce92dd0b0b22092832b2023f1e0b5a6ee6ebc2fce787470efe7f3f0ca62c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites, suggesting a link farm or redirection strategy. One prominent URL, 'https://ttraff.ru/pify?keyword=alien+vs+predator+full+movie++moviescounter', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to movie titles and the malicious URL, reinforcing the lure. 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.ru/pify?keyword=alien+vs+predator+full+movie++moviescounter
    • http://pebule.championcleaning.net/uploads/1/3/1/3/131382134/8272b4cb409.pdf
    • http://files.hcmyc.org/uploads/1/3/1/0/131070754/373792.pdf
    • http://kigil.surrattbooks.com/uploads/1/3/0/8/130813765/nunirazabo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/jio_rockers_2019_tamil_movies.pdf
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/wuvazofiliwineta.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/kizanurew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/viwimapuzuvare.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/angiosperms_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/12270640010.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/44302527200.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/leah_edelstein_keshet_mathematical_models_in_biology.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/tikkun_korim.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/84886601366.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_off0000ad07.bin
a2265608b963729abc4202628ef24d59980cfb9abb521a315d03c7b01c325c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD07 5352 bytes
font_01_sfnt_off0000bf23.bin
c8a8deaefad60b77b35304d8791d084ce468f7b470a7762e43d533b89e38e958		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF23 10868 bytes

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