Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e868c30818ce1e0…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 23:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad0b09b0672578897a872102e851cb9f SHA-1: f65f1b16a12a3a7ce0966e38fe5b78bfde2616c0 SHA-256: 1e868c30818ce1e0a6bc067f32c633d91913ea24ed968e4d5cc5a628d1401833
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, including a suspicious one pointing to 'ttraff.ru', which is known for malicious redirector activity. The primary attack pattern appears to be SEO manipulation or a phishing lure through a large number of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=les%20autres%20gens%20pdf
    • http://zibor.alexanderashby.com/uploads/1/3/0/9/130969959/mewukivozefagu.pdf
    • http://tagituruf.imperialgrp.com/uploads/1/3/2/6/132682587/211068c799e.pdf
    • http://files.efreewarrensburg.com/uploads/1/3/1/3/131380024/9726922.pdf
    • http://files.janesboypress.com/uploads/1/3/1/3/131379268/e8ee79fb5.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/sevabazuwurapi.pdf
    • https://cdn.shopify.com/s/files/1/0448/0398/1463/files/o_capital_livro_3_boitempo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/bewiloz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/scope_of_work.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/57607620716.pdf
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/zuzanulak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6793/9743/files/dugutoguwinewodufise.pdf
    • https://cdn.shopify.com/s/files/1/0435/6656/3487/files/xevujiledazesabe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007007.bin
6b898741c7f2595dd79621a83501ded1b7a0dc78e0d37b7a5e3a2c177338aa2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 5116 bytes
font_01_sfnt_off00008180.bin
8ecca0ff34796cc6b8f773c99184a04ea28d280815069d2f024bb81ea0cb2b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8180 16156 bytes

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