Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e891a525865884b…

MALICIOUS

PDF

36.3 KB Created: 2020-08-08 17:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c29082e44f5fad971b35f5495b85c9d SHA-1: bfbe8bd8933473e64becd0922f36e33cb0899490 SHA-256: 9e891a525865884bede261ba7264e6f8c5c8461c8589ab88dec6e82e4c37dd71
150 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to a link farm hosted on Shopify. The primary redirector URL, https://ttraff.ru/pify?keyword=entropy+optimization+and+mathematical+programming+pdf, is flagged as malicious. The document body itself is heavily obfuscated and appears to be a lure, likely to trick users into clicking the malicious links. The presence of numerous links and the redirection to known malicious infrastructure strongly suggests a phishing or scam campaign.

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=entropy+optimization+and+mathematical+programming+pdf
    • http://kijemu.rachelbeckles.com/uploads/1/3/0/8/130874359/vivaxufo-kesediteloko.pdf
    • http://files.launchbusinessgroup.com/uploads/1/3/0/9/130969260/4063810.pdf
    • http://files.redcientificaescolar.com/uploads/1/3/2/6/132682168/2f2e031e10bbc9a.pdf
    • http://duronesep.yue-fei.com/uploads/1/3/0/9/130969426/rijusazuv.pdf
    • http://files.aquaelementeliquid.com/uploads/1/3/1/3/131381900/9440371.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/34672301811.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/mogusukeniril.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/geographical_information_system_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/43506940811.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0445/files/31355713020.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/heroku_static_site.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/sims_3_mansion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/lopetemazatem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/80179675600.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/10663101389.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_off00004dd8.bin
603e802deb2918c9a14581dbc8c01d37e99371d7858a906ef5c0ba79757d84e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD8 5500 bytes
font_01_sfnt_off0000607b.bin
d2ac7995430a786022aeff2d6a842816ebba56933ca1a7a3b0b5304a4bcbbaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 10416 bytes

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