Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2badf4b3fe881e…

MALICIOUS

PDF

40.1 KB Created: 2020-08-18 23:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28a90dc2977491e053305e81e490226b SHA-1: c64a65b7914271fdb9f9eb89feb7b30a709f9910 SHA-256: 5e2badf4b3fe881e3683853f5549699fe3298d70c80e2138d70d809495e9ed4a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to a malicious URL, likely for phishing or to download further payloads.

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/pify?keyword=urbanization+group+worksheet
    • http://bemifaw.christusvictorlearningcenter.com/uploads/1/3/1/3/131398091/1595274.pdf
    • http://files.rysaa.com/uploads/1/3/1/4/131437484/jefafap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/wordpress_disable_comments.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0742/files/kuwogaposepirumes.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/jegijalepugejiwuxik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/galagatigam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/wozewokesixujufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/34839137732.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/43208715668.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/73359273513.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/87737826608.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/dowibuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/38147685306.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0893/files/27033232314.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_off00005eb0.bin
b1dbd349d85323f042b8d1766074d2e7a63a0b0030dd0aa14d0679c88bb2ac21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5388 bytes
font_01_sfnt_off00007113.bin
87cdc74476074ff3ebb89cdc10478a925e69723c43b8d8756188ca8a63a41323
pdf-font-stream PDF embedded font (sfnt) at offset 0x7113 10132 bytes