Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20a9abd3504dc46…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 20:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20dd2d5e9b1c7d537b11a65ecfb6616 SHA-1: fb518ffc2458ef07147f47d0aba2d43b4656611e SHA-256: d20a9abd3504dc460052a8452e10f5b53670af8dec85ee3df2ff66ac12c66c4c
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant portion directing users to a redirector service (ttraff.com). This suggests an attempt to obscure the true destination of the malicious content. The presence of a large link farm, including links to Shopify domains, further indicates a campaign designed to distribute malicious content through various means. The ML classifier strongly flagged this PDF as malicious.

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=allergen+information+ireland
    • http://files.vonkaltbach.com/uploads/1/3/0/7/130775862/kukunawud.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/attagasam_hd_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/insuficiencia_cardiaca_congestiva_signos_y_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/nys_contract_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/bundle_id_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0463/4076/7906/files/chamelephon_apk_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/82377317590.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/pigukefovekazawazerino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/fomiputilipisunazewebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/19544987608.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_off0000764b.bin
4c74e9c813f8abb4e1423029ed344476c38c5e10df699337a9f3d7887e5159c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 4824 bytes
font_01_sfnt_off00008688.bin
f6bffc17a2fa0f39b753e632ca7673120dbf8cf2bf9a2bdabe4d48e06bb2d142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 10512 bytes
font_02_sfnt_off0000aa74.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA74 4324 bytes

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