Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4b2ac66af8ba8b…

MALICIOUS

PDF

47.9 KB Created: 2020-08-17 03:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02fdb700f9d8674d29ccb52e15d37e6c SHA-1: ce24fe7209adef9fd3ad332b3517eeb1f1d53bb1 SHA-256: 1b4b2ac66af8ba8b86a01060008dde84dc00ba27e2d83ea9811391fe2633b6b3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that points to 'ttraff.ru', which is known for distributing malware. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'Gta 5 bunker guide solo'. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO farm to obscure the malicious redirector. No scripts were extracted from this sample.

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/pify?keyword=gta+5+bunker+guide+solo
    • http://files.marquitalopez.com/uploads/1/3/1/3/131379434/nasuxolidure.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/free_indd_templates.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/git_undo_commit_after_push.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/zeta_psi_pledge_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/millennium_development_goals_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/aistear_the_early_childhood_curriculum_framework.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/nudilar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/25426848143.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/dumirolusejepokewowe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/34313393284.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4559/files/zemez.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/star_plus_serial_behnein_song.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_off00007a8e.bin
a4e47c5b027b41b8f66da384cc3e3faae19602799619af5b5b16bc9a64aa0ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 5352 bytes
font_01_sfnt_off00008cdd.bin
cb12d7f7e9bf7cfbf95ec8e860ba415e70ad5c3389501700091115429ef4b9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 11224 bytes

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