Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b357cb0874884d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-19 02:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45e4d2b81be907484b65ed0f10606260 SHA-1: 3bc87e86fd8cae82ea3402208333ae385693420f SHA-256: 66b357cb0874884da2336aac7bd98234fc4e73038cd97b646b5b20a28326fcdb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern is a lure to a malicious URL, likely for phishing or malware distribution.

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=shoe+size+guide+uk+europe
    • http://files.richardbuckinghamfurniture.co.uk/uploads/1/3/1/6/131606965/1626117.pdf
    • http://files.thepamperedhen.com/uploads/1/3/2/7/132712326/kabotem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/tosiniravujowixukefami.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/89828967673.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/xetilojenufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/fofiwod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/47443071495.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/appium_start_android_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/59357805826.pdf
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/bilingualism_vs_multilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/81351803766.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/statistical_analysis_of_microbiome_data_with_r_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/zikewofawowadowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/64080168029.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7651/files/beatriz_sarlo_libros_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d5.bin
17f0b71b38d731d82b97056e1a2c2fb5a6a9eb98b7c09b55a7edc9f15049d1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D5 5196 bytes
font_01_sfnt_off0000787e.bin
b81df03c1746155aca584cb1eb1df6691a10a10299527dc918719f8096a66954		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787E 1576 bytes
font_02_sfnt_off00008097.bin
62da0519c25762cf237bd133008a2c0dc4b7615fa1da1923fc572759fc44167c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 13696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.