Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c55469888d1f75d…

MALICIOUS

PDF

50.5 KB Created: 2020-08-30 13:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab3ffd5c9821aef34d5b41c023675bb SHA-1: 66854c5fb8c86fa15f324c0624a8e43e76d52157 SHA-256: 5c55469888d1f75d63b04d1bacfae076188ee6ea6cf1f8bb228399b2bc9eea30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to 'Total War Warhammer elves guide', likely intended to trick users into clicking the malicious URL. The presence of numerous external PDF links also indicates a link farm, potentially for SEO manipulation or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=total+war+warhammer+elves+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_11de0c5dc2014f0196e3ad40bd25b310.pdf
    • https://static.usrfiles.com/ugd/b8c837_68780f2a0bd846f2930ccf35a77f2cf1.pdf
    • https://static.usrfiles.com/ugd/ddb60a_e4fbe8979b884e8a9f5617199732be94.pdf
    • https://static.usrfiles.com/ugd/cdb50c_ec5f0039f96840c4896e6aa9be7ea4e1.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/arduino_uno_projects_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0008/files/koriwejuguwegoxar.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/navy_3m_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/shrek_2_trke_yama.pdf
    • https://static.usrfiles.com/ugd/913720_1530ae8c7dad4007964aaa3b709787c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f729a6cd084929a663a34438542b81.pdf
    • https://static.usrfiles.com/ugd/824332_a53618d9d1224553a5b61b04cc9b6a91.pdf
    • https://static.usrfiles.com/ugd/b8c837_71be042c184646ac8824a5897df6df64.pdf
    • https://static.usrfiles.com/ugd/b8c837_d651e23ab92a46b288ddd990eec6e769.pdf
    • https://static.usrfiles.com/ugd/e73fea_1274da7f3f61425ebc1805a0d70427aa.pdf
    • https://static.usrfiles.com/ugd/0779a3_532c0fd7da4b479db75ccbb6a050bc3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb0b068f3bd44d729797f132ed3b1342.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d7.bin
6b48d4a0c97063453c0099fa177dae2d8d9c1826c08f48c185e988cfb5d61072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D7 5116 bytes
font_01_sfnt_off00008b55.bin
40783d98f701283085a2881fac162303ac8d304bedddfdd45b0aa46a288479fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B55 10644 bytes
font_02_sfnt_off0000af36.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF36 4324 bytes

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