Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e39e90018c7d99…

MALICIOUS

PDF

44.0 KB Created: 2020-11-03 10:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d89791708af5d5a7a42eb92c512b8f4c SHA-1: d591e10f882f7b3a74fbf998ff8867d6034a818b SHA-256: 48e39e90018c7d99d5ba61100e03dd46ba0b4a68f4fdf28408fd4d20ddd2c57e
154 Risk Score

Malware Insights

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

The PDF file contains embedded text and a URL that impersonates a Leviton timer switch manual, likely as a lure. The primary malicious URL, https://ttraff.ru/123?keyword=leviton+timer+switch+manual, is flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the structure suggests it's designed to lead users to harmful content.

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.ru/123?keyword=leviton+timer+switch+manual
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f87fce8b7a97.pdf
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5f8e10257fe2f.pdf
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5f87847ed2f6d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0498/9481/7948/files/what_is_a_public_service_program.pdf
    • https://uploads.strikinglycdn.com/files/03ce5a44-41b8-4ddb-bf2e-ad1bde4c17c2/79957783242.pdf
    • https://uploads.strikinglycdn.com/files/e0685914-7515-4909-beff-ada1ed1a1e56/xutetajibibolewozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4846/8631/files/76991369126.pdf
    • https://uploads.strikinglycdn.com/files/7b0df1a1-27f7-4078-9748-eb3e8fb5b486/92199698479.pdf
    • https://uploads.strikinglycdn.com/files/45273184-0e11-49ba-ab19-9303471cc0d9/33711067163.pdf
    • https://uploads.strikinglycdn.com/files/937a38a4-3736-42e1-b121-667eeb49d030/fugazirewugubuvox.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_off00006c26.bin
eaf4bbc8e21805416d872797cd1d9c6e3f86c54372cb84d51ddadf3a4f04af1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C26 5132 bytes
font_01_sfnt_off00007d88.bin
732b70b20c6c4c8f359ccd09847f3eb953385f5f7a06551482e74aba2dca4b26
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D88 11052 bytes