Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1af36b227cd922…

MALICIOUS

PDF

52.6 KB Created: 2020-07-27 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b4493a6c4d5e433eb133a2b1ce6d28d SHA-1: f06726ffa208499b2fb8cd4d5247d7ee89887157 SHA-256: 9a1af36b227cd9220dbfeb487c77755c41ffa6789320513435d3f56e33267fb9
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm, suggesting a social engineering lure. The document body, though heavily obfuscated, contains text related to SEO software, which aligns with the link farm's purpose. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a link to a Shopify-hosted PDF, likely as part of a phishing or malware distribution chain.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=search+engine+optimization+software+free
    • http://files.thehauntologist.com/uploads/1/3/0/8/130814529/aef1aea46f.pdf
    • http://files.cml-mpn.com/uploads/1/3/2/7/132740692/rasoxuvipenejato.pdf
    • http://files.topthispizzacrusts.com/uploads/1/3/1/8/131856112/tinezex-pewokizinixudod-vaxes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/tuvosiwixapirupikagim.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7700/files/guxenixiwidatomopukodun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/69562455108.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/fifanuwaretoraseru.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/kekurefejepiwebosepiletir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3743/files/37008827221.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/50799978873.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/xegagizopupakijomatoguva.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_off00008f58.bin
d1dfd17f8d06050b3c937c2e909c5fd205edd2c5505a6879d4779454391d9342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F58 5428 bytes
font_01_sfnt_off0000a1ae.bin
4138cc2a643986c7c5b65923d8dc4b8e9e5ecdc60032c33959af42c1f943c765		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AE 10392 bytes

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