Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f938d8367114138…

MALICIOUS

PDF

50.2 KB Created: 2020-08-24 17:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0e6f7fce13e5cdcf29aa046bcb4de6 SHA-1: 70c54f3540327c312be17a2686d908a00adb00c7 SHA-256: 8f938d83671141383a826f10964ab5a16f3341fedc1765c8de23f3b2fc010243
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.com' which is designed to lead users to further malicious content. The document also exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link within the document.

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=bucket+list+movie++bittorrent
    • http://files.geppscrosscricketclub.net/uploads/1/3/2/8/132814989/6382037.pdf
    • http://files.directrvparts.com/uploads/1/3/1/4/131452836/595b16df.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/mobiwasuvutegaroponaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/setixinojed.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/lirinomaxetizodes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/marini_asphalt_plant.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/oblivion_multiplayer_mod.pdf
    • https://cdn.shopify.com/s/files/1/0437/3023/9642/files/equilibrium_constant_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/definicion_de_evaluacion_diagnostica_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0439/1524/7771/files/bangor_university_map.pdf
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/5117010643.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/pazonevotupagisuruba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/checkmate_marathi_movie_free_hd.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/area_code_570_cities.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/50677724885.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_off00006f28.bin
ef944e3f9b1c844d3feb051aea96bb27810f5f7c8a1b098e20d091dcd906ab95
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F28 5048 bytes
font_01_sfnt_off00008047.bin
088263bea63e8fde5cf288f5962d4df77adc57c75a6a41b36d2a26222f2be18b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 10640 bytes
font_02_sfnt_off0000a4f0.bin
e596152e75094301245ccdcde7d3c872d2918ce930f2c63af9e47fdfe3afd66d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F0 16192 bytes