Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de108e5245a25a6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-08 13:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 023865e680273baf5f6d25d2bd84107e SHA-1: 60eff07cd7a0dff3907b99391bd48972bda06cc5 SHA-256: 8de108e5245a25a6e512b30bec70734623616e3575b16ae1031972c6fa1d11fc
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure related to a legal act. The presence of numerous external PDF links further suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=cestui+que+vie+act+1666+pdf
    • http://files.studioandronico.com/uploads/1/3/1/4/131483372/niribe.pdf
    • http://files.sleekbodyonline.com/uploads/1/3/2/3/132302819/f167c0263a4.pdf
    • http://files.jaehyungum.com/uploads/1/3/0/7/130739991/c8f9a42ca4f90a4.pdf
    • http://vekizi.gremassagetherapy.com/uploads/1/3/1/4/131408899/164ff.pdf
    • http://files.katekellydesign.com/uploads/1/3/1/4/131482878/8132750.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/38919164859.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/zagenofibur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/88714050592.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/90758833792.pdf
    • https://cdn.shopify.com/s/files/1/0433/3512/3102/files/84445349479.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/78892760431.pdf
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/nuwujavijizifalege.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/sofepusabezipadiniwuwotuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/tosixumenidiva.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/zimudawarejezibif.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_off0000635c.bin
dc8fa56b3251f0f58c475bba9e1fcf13bcb154f13dc5ea3e9fdaec1c850009ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 5316 bytes
font_01_sfnt_off00007590.bin
ecb8102eb843f6c174823c94497004879a372b8b4e18481e0cfb22c7ada352a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7590 10104 bytes

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