Malicious PDF — malware analysis report

Static analysis result for SHA-256 569c4d237867b1e3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 02:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfc9d812f29a7b76f9573374df35a239 SHA-1: fdb7f5c75197cdf75c6f4a6d9d0e4c849534a887 SHA-256: 569c4d237867b1e365a5e252530add29a94b03db207cda4afa84e9b21890b450
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same redirector URL and a list of numerous PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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.com/pify?keyword=hallux+valgus+xray+report
    • http://files.kevspickled.com/uploads/1/3/1/4/131483255/vetabenes-wiguzif-mokuwijexadolit-vesifepivekavus.pdf
    • http://files.themusicchord.com/uploads/1/3/2/6/132682820/donunalex_xekediw_pisovosa.pdf
    • http://files.rcnanorthbay.com/uploads/1/3/1/4/131438453/lexib-niwovexogis-korivu-funefemaxajuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2552/3103/files/pelimofutedijuginilukemez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/storm_brigid_kemmerer_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0440/5487/2214/files/bufapivetinegebuzupaboj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8371/0117/files/jalorofujezegizominifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/shopping_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/pupedemuwavevigemuwus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/51788721031.pdf
    • https://cdn.shopify.com/s/files/1/0433/2837/2904/files/aptitude_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/budgetary_control_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7125/files/99_names_of_allah_with_meanings_in_roman_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/9013/files/cntico_de_las_criaturas.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_off000065a1.bin
f643656638027f342d4de6066894c569712304f39e9f75cb3b39890f5cc7aa09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 5176 bytes
font_01_sfnt_off0000775c.bin
faaba6b1dbc3686b658548e948f5d41d8072e263ab912a370cc4ae064828cc18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775C 10152 bytes

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