Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7a036b55932dec…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 11:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 174cb226b0c4c75e819c7687076b6938 SHA-1: 02871473833663f75a6364b98a5a09117b88066f SHA-256: 4a7a036b55932dec121a870f554b6f667a784ca11b6dc455fab5e5225853c9a1
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. It also exhibits a PDF link farm behavior, with numerous links hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL and references to free game downloads, suggesting a lure. The combination of these factors indicates a phishing attempt designed to redirect users to malicious infrastructure.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=avatar+hd+game+android+free
    • http://files.nancyjcompton.com/uploads/1/3/1/4/131454521/6d605b0d4d3.pdf
    • http://gudepiki.wendellalexanderrealty.com/uploads/1/3/0/8/130814168/lafugazezovebimutu.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/ridabumuledanupuwisexajub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/array_in_c_programming_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/letuleta.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/12th_bio_botany_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/88770176773.pdf
    • https://cdn.shopify.com/s/files/1/0434/4817/2710/files/68609578761.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/30892352965.pdf
    • https://cdn.shopify.com/s/files/1/0459/6544/3239/files/81278495026.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_off00006225.bin
1edc9518b9c9a7ff946df35a6779cbd64be8845c9a5b5bcbc3db2edb860ad8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5160 bytes
font_01_sfnt_off00007397.bin
cf91d4bffc98440c545294c6356c4c25132a94dff73a63ba26840cb60ea66a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 10472 bytes

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