Malicious PDF — malware analysis report

Static analysis result for SHA-256 398f5c6523c97fa6…

MALICIOUS

PDF

68.5 KB Created: 2020-08-17 11:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5146910f3e6bc8cc2519249ecebdad2a SHA-1: 238a414d05752825d0ee48ae8a4fca797292c804 SHA-256: 398f5c6523c97fa615d67e7b084ea591e14853e68df1174363131a58e8b30b2b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=maradona+malayalam+movie++400mb', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, and the primary malicious activity observed is the redirection via embedded links.

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=maradona+malayalam+movie++400mb
    • http://files.azaleaandrosebudknits.com/uploads/1/3/1/3/131380158/letubaledosa.pdf
    • http://files.thegoodflow.net/uploads/1/3/0/8/130815014/fudefav.pdf
    • http://files.braunsacredheartcenter.org/uploads/1/3/1/4/131453615/jufuzizo.pdf
    • http://gopuruma.twisted4kstudios.com/uploads/1/3/1/6/131606552/4095985.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/87747477101.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/9654859279.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/bovukubonutopegikabapixum.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/27207747344.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/34230651977.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/87561200256.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1703/files/jurnal_gerak_tropisme.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/14674318255.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/biological_psychology_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3499/2025/files/card_games_rules.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/26048259572.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/dasikogadutobaxam.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006939.bin
1f90f6043ccabe07d7bfb4f22a26896b22bb72de2473345c5e6939db248463d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 5332 bytes
font_01_sfnt_off00007b50.bin
cb30ccbe3470e24abea742643761fe43cfe74664858df86eeeab0c9a4c342ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 20968 bytes
font_02_sfnt_off00009b7f.bin
bad47d694a1dd9c664d92593e9aa530dcfdac95caf8f68d8ad6f6049d2ff5117		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B7F 2276 bytes
font_03_sfnt_off0000a543.bin
ba82bddc52151dfeee6db60d0c1c86a86fb47df6a3ccf8e3d7bf8bd3be533e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA543 5260 bytes
font_04_sfnt_off0000b7f9.bin
a1d60c8d4ee78f267154ceb5113f9e7e3c27789974bf2e5ccf983bd438f9e35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F9 11392 bytes
font_05_sfnt_off0000de07.bin
910a4a321674eb6f92d2ff7c8d1c610dec0baec70875226a9f849b85c52857ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 16200 bytes
font_06_sfnt_off0000f358.bin
900a39040f65af230d6d1c82991dc921059459ad6615445d274ad122a7161834		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 6308 bytes

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