Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fc0e129622ff29…

MALICIOUS

PDF

42.2 KB Created: 2020-09-06 21:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a13e51fd8cd304e2dc60c1fa7d9dbf81 SHA-1: 681a2d15392f05c33268d1927b2afbebf05ef261 SHA-256: c8fc0e129622ff291bdade101f559d7599da93bbbb1b83812e181721db510f49
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.link'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same malicious redirector URL. This suggests the primary intent is to redirect users to malicious infrastructure, likely for phishing or malware delivery.

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.link/wix?keyword=tuberculous+pleural+effusion+pathophysiology+pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/robotic_surgery_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8109/7631/files/bartender_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/historia_de_la_administracion_libro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5046/files/36982901734.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/7027022318.pdf
    • https://static.usrfiles.com/ugd/afe78f_c69a413eafb44f80adee65fcdbea75e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcbed99362e3420ea838c0c4bbed583e.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/nizemediziwagibifokima.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/yoga_books_free_download_in_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a95.bin
bd29a1d01df861c61ba2c314522112af3451060bd6af6e07064d8ce2e02ce5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A95 5488 bytes
font_01_sfnt_off00006d33.bin
b6cb05451c2c3959d2dc4e535789fb803dfcd3736c7e187a213f499e8af98e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D33 9604 bytes
font_02_sfnt_off00008df8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 4324 bytes

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