Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba910336a6d8efd…

MALICIOUS

PDF

142.6 KB Created: 2020-08-25 02:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3689b5400d2d16771a02af351e7a668c SHA-1: 8273b24a7ef0686e6a9e5f4b92df541f465a3426 SHA-256: 4ba910336a6d8efd7913abb097da5359d98ff832df6f2682f9b09bbc13a327b8
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating it's designed to lead users to external, potentially harmful content. The document body, though heavily obfuscated, contains text that, combined with the heuristics, strongly suggests an advance-fee scam lure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=answer+my+question+the+question+jerk
    • http://jezeki.katiecetta.com/uploads/1/3/2/3/132302942/7520294.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/pufewoxis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/kedigiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/algebra_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0108/6111/files/59582337931.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/gasikewipapu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/33451466780.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/molecular_biologist_s_guide_to_proteomics.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/piriformis_muscle_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/11737151697.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0390/files/causes_of_water_pollution_in_nigeria.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_off0001e828.bin
f95e3ce2a12f7645d7e74933264ff22d79aaa30602d21533b0312f0de69c58bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E828 5132 bytes
font_01_sfnt_off0001f986.bin
2855a91460c3ca95fcbaac4e09c35dc7e62237543d725c4612eefbe30dfb65b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F986 16368 bytes

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