Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edd57e810c2afb6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-24 22:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9964a30a7a698e3f6964ed350f1b46 SHA-1: 83aba422ca9049958ce4f23ab9a10365e86544e6 SHA-256: 3edd57e810c2afb66845dd1e2f7f910b139af75c0dee6bca2967a7c760d257f3
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious content, specifically advertising 'ullu all series free'. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ullu+all+series+free, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and numerous other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

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=ullu+all+series+free
    • http://rubilo.agbio-inc.com/uploads/1/3/2/6/132683130/316ed0b4faced.pdf
    • http://files.paintingrochester.com/uploads/1/3/1/1/131164355/sigotetumugutikidas.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/41224553757.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/94573259301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/69982044130.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/viguzif.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/6439303869.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/convert_to_word_online_for_free_without_email.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/nuwafitogudataxevajokasow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/agnello_di_dio_gen_rosso_spartito.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/19648664154.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/soneku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/luxuxini.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_off00004cc6.bin
c51549e2f05d9a4862c420c352d52d3c84d2d6b85b3faaff87b4a42f34c78818		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC6 4752 bytes
font_01_sfnt_off00005cf7.bin
a52149aa33938f632b1f5927a582a7a5f686ff13fb0ead1ead9f66b2a83e6808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF7 10108 bytes
font_02_sfnt_off00007f66.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 16164 bytes

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