Malicious PDF — malware analysis report

Static analysis result for SHA-256 df731859b8b49fbe…

MALICIOUS

PDF

46.6 KB Created: 2020-08-28 23:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59a515733416489ea75b6aa65d18d0f SHA-1: 6c306f0f6aff690a2f394c533d095183f6f09917 SHA-256: df731859b8b49fbedb30d37ce496ddacdb2dac34bc7def66d23129488ab51035
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious destination. No scripts were extracted, and the PDF structure itself does not indicate further malicious actions beyond redirection.

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/wix?keyword=escape+from+tarkov+gunsmith+part+4
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/9998013248.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/solubility_product_constant_lab_35_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/2797772827.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/vifenotalutuwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3101/files/danufenijanifatiwili.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/ccna_routing_labs.pdf
    • https://cdn.shopify.com/s/files/1/0432/4494/5571/files/10172516903.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/goliferewod.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5ee22d5d4194382b5ba869f65d86ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5423c5b111fe40129d672af19baa3b33.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7566470a67f4d2f9b2a0e6f8c7a8f65.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f08fad810a54e01839bdafd1b2ee5ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_564a652eb83b4f5a923aa5e0bee86d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a81b69b956e5473c91c32c5a7c31e113.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f35e69666394c26ba122993f94d4a6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b84c6da799b543d1a62975f5d6b26b31.pdf
    • https://static.usrfiles.com/ugd/b8c837_891e1e417a1c4325ab2beba557355967.pdf
    • https://static.usrfiles.com/ugd/b8c837_b494aee22bf24c66a2f01cbaac0af754.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_off00006f6d.bin
ae61fc3512bff9c9d5ef3fa36c5d268441087a297f999b37eb7fcda744ccc730
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6D 5568 bytes
font_01_sfnt_off00008243.bin
1c803db4ca3d1b09f0b2f912b8ea2b7c47ba2a9ef04abd6aa8ab8435f845f500
pdf-font-stream PDF embedded font (sfnt) at offset 0x8243 13616 bytes