Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5d36c6fda788f1…

MALICIOUS

PDF

41.5 KB Created: 2020-09-05 15:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29676f5bcd47fe171f4ec2e2a8fe76de SHA-1: 6fab66e9375c12a3e47ef2ccfcd7c64a1d1623e5 SHA-256: fd5d36c6fda788f1798ea2efbf6213632f06c84b92f59bf2613f8a014e6a6c9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as 'platform sandals outfit ideas'. This heuristic firing, combined with the ML classifier's high confidence, indicates a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL and numerous other benign-looking PDF links, suggesting a link farm designed to obscure the malicious destination.

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.link/wix?keyword=platform+sandals+outfit+ideas
    • https://static.usrfiles.com/ugd/ea2f88_852dbd2d533d416d8733ffeb3fff0b46.pdf
    • https://static.usrfiles.com/ugd/510691_7aa834e2f5cc49e2bb96c8fe1ba0de01.pdf
    • https://static.usrfiles.com/ugd/64d889_bb16360fe55d4894be545ad34b1ca877.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/calculus_of_variation_by_a_s_gupta.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/67842750304.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0972/files/baadshaho_full_movie_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0457/0824/7196/files/elements_of_poetry_worksheet_6th_grade.pdf
    • https://static.usrfiles.com/ugd/9cb927_8c8860601852450a90e6f0616c4a96d1.pdf
    • https://static.usrfiles.com/ugd/1df9ea_20fde22657aa4b68a26eef39671d9b87.pdf
    • https://static.usrfiles.com/ugd/cc14e4_7d6f1080c8ab48429162046453e80b75.pdf
    • https://static.usrfiles.com/ugd/943725_94103f45439e4d859f998f2ac205f554.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_off00005917.bin
00ca229a97c90c65b0d5edfb6d6024af06295ae83e3b57da1a6520b7526c3e52
pdf-font-stream PDF embedded font (sfnt) at offset 0x5917 4936 bytes
font_01_sfnt_off000069b4.bin
6d1ba318b7014d198b0fdba1b1e5e51ba0579efe804f360e5c6f4e1c21b320f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B4 9820 bytes
font_02_sfnt_off00008b43.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B43 4324 bytes