Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b17f8aa22e6faec…

MALICIOUS

PDF

35.2 KB Created: 2020-08-30 12:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bee64d35973e6df38d7fe1ef89d47e1e SHA-1: 1eb7e3035a78e33a387edfa267e23ea74248e54d SHA-256: 5b17f8aa22e6faecc8f575557421f22ff285463b2ad2825420061d790ed6fe49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a redirector URL, which is flagged as malicious. The document also contains a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious link identified is https://ttraff.com/wix?keyword=retention+scale+kindergarten, which likely serves as a gateway to further malicious content or phishing pages.

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.com/wix?keyword=retention+scale+kindergarten
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/97634b_86228918a3d64e6fb1c9864088b62e50.pdf
    • https://static.usrfiles.com/ugd/5ed537_07ae6340909c4cfab9939fab9c6a6ca1.pdf
    • https://static.usrfiles.com/ugd/8e1900_371cc04abcb0447eb65f2cdd9e3d0387.pdf
    • https://static.usrfiles.com/ugd/b8c837_31eafa4a4833453b89353e055376cbda.pdf
    • https://static.usrfiles.com/ugd/e73fea_03fac4a317d14d89bec8349b28a8bbdb.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/baadshaho_movie_hd_online.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/62118067631.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/kuxevejagar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/gym_workout_chart_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/90296316110.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/delubagetejafonepito.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7183/files/65270844233.pdf
    • https://cdn.shopify.com/s/files/1/0437/6422/0055/files/ruramarelerako.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/que_es_un_acta_constitutiva_de_una_empresa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ccc.bin
b9f868d84eb4af38775011e5409f63d550a5ff68f1d4bafaf0b01a688eefe403
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CCC 5180 bytes
font_01_sfnt_off00005e79.bin
97a1772330048eff10589fa6136b630e52275cc7c1b38e750e2d33e21c9d8490
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E79 9960 bytes