Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b74e677c9135c07…

MALICIOUS

PDF

49.2 KB Created: 2020-07-30 09:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2471baf38666b7b9e022a640fac7a7fa SHA-1: e00ed0f322b05d1e6b2d51aec9e48599f933e85c SHA-256: 2b74e677c9135c078444e99642b229f9c64486b63319c4114c586553681a41a8
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.cc'. This indicates an attempt to lure users to malicious sites. The PDF also features a link farm, suggesting SEO manipulation to increase visibility of malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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/pify?keyword=asme+b31.+3+hydrostatic+testing+pdf
    • http://files.cybercoworking.com/uploads/1/3/1/4/131452938/5228557.pdf
    • http://files.robertmckayjones.net/uploads/1/3/2/6/132681453/1388251.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdf
    • http://files.marniefanegastudio.com/uploads/1/3/1/8/131871480/nivivesukekoli.pdf
    • http://files.christinazero.com/uploads/1/3/1/6/131606366/xajapan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9543/2099/files/35756977918.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/88042332399.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demesudixagivok.pdf
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/fesefuzomimofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/bobanudasexesapatitom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/17033303715.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/tubusojutixagowadukor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/16583084218.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2027/files/dewonexosapomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2548/files/47007450062.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/momoderisoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/tekesagunujetoxusegutoweb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42778981568.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_off0000808a.bin
784ea7f1899686fdff4c9ce17e55b7dfa7813d59947faa1706999f1c29d2f747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x808A 5804 bytes
font_01_sfnt_off00009427.bin
8edc328a8fd155e2acb18f6a7fefb9d029623c14e84975cb14e869c22d530212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9427 10296 bytes

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