Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fc3491f7f4c67f…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 05:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc68c96ecdbd62254a400502c7ee522e SHA-1: dc4fa25d3b2680ff30aee625080166a73cdba425 SHA-256: c9fc3491f7f4c67f70674bd640a77efca644560d89f695795ca7c66c558c030c
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on ttraff.ru. This heuristic indicates a likely SEO poisoning or phishing attack, aiming to lure users to malicious content. The ML classifier strongly supports this assessment. No scripts were extracted, and the document body is heavily obfuscated.

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/wix?keyword=pathfinder+orcs+of+golarion+pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/rutagopijiruxugibedip.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/siwufakonozotofajelero.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/23479339456.pdf
    • https://cdn.shopify.com/s/files/1/0430/6658/9335/files/sublime_keyboard_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/2010_volkswagen_jetta_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/rolling_in_the_deep_adele_mp3_downlo.pdf
    • https://cdn.shopify.com/s/files/1/0454/6284/7640/files/40425859100.pdf
    • https://static.usrfiles.com/ugd/4826f5_99206f918f9543af97e14e7fe758f7af.pdf
    • https://static.usrfiles.com/ugd/2ac701_bd06b4afb5954e848462126f20c80133.pdf
    • https://static.usrfiles.com/ugd/b8c837_acc9de464a35427b99cb71e95afca048.pdf
    • https://static.usrfiles.com/ugd/b8c837_db0f21ed758f4bd0b9a393ee819e4285.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_a8350eee444a4bef8dfcd1efb1b21937.pdf
    • https://static.usrfiles.com/ugd/0c4177_e89e8acbf524413980663b846319fa2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e6e44d4e4bf4eafb1fee7e3daa17d38.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_off00005866.bin
388fcdb13f44dfbb3a2aef1d0a39ddd02e4465b54048e996ecadb1a168487ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5866 5420 bytes
font_01_sfnt_off00006ac4.bin
e96f21c98403c6254bd3d1f44b38a99a68aa8565a90385bc70b97e242efcb146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC4 10228 bytes

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