Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59d4a9b40c4af51…

MALICIOUS

PDF

33.2 KB Created: 2020-08-08 12:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80180ac7bec9972fd5b6b20ced56050e SHA-1: c85bf4dcd2873f3de48b78719cefd6d9f3185ef5 SHA-256: d59d4a9b40c4af51f3fbddf911659c028b3e9f4a45512dd642d95dfe8a0b4224
120 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, pointing to 'https://ttraff.com/pify?keyword=anthracene+msds+pdf'. This indicates a phishing attempt disguised as a search result. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of malicious intent.

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.com/pify?keyword=anthracene+msds+pdf
    • http://files.innspyre.com/uploads/1/3/1/3/131384070/689f3caac71caa.pdf
    • http://viguvopa.senoramoore.com/uploads/1/3/0/8/130874218/zusata_logedubixadikaz_madifodusuresi_kewon.pdf
    • http://files.worldwidecycles.com/uploads/1/3/2/6/132696558/4383259.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/exceptional_learners_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/vewakakosazabuxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/sevokajuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/16395079071.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/tabiwiveneberozomig.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/77735118949.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/21436967131.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/53218546742.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/sadobanajijunine.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/sonifeme.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_off00004311.bin
3ca365ab19e33dce12a6b83465e58c262bf483a14894600029891cb8ccd2aabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4311 5352 bytes
font_01_sfnt_off00005515.bin
1f5b796f1cdfcc5c5f7d9349478562291e747692e00f30662f006d191ddd5301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5515 10004 bytes

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