Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e992ae4d6872b48…

MALICIOUS

PDF

46.4 KB Created: 2020-07-30 22:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005f2d98a8c7eaaf918e5ef13baa68a7 SHA-1: 2951181151acab49b962993657b9cf0961be90d4 SHA-256: 7e992ae4d6872b486ab4a9d98937efc9911cd5f50f1feac7f456128bab9e7a63
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=autumn+leaves+lead+sheet+pdf+bb', points to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific lure.

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=autumn+leaves+lead+sheet+pdf+bb
    • http://files.saskcorpservices.com/uploads/1/3/2/6/132695460/jomikavi.pdf
    • http://files.burrataandchardonnay.com/uploads/1/3/0/8/130874608/vefopap.pdf
    • http://files.rtapps.co.uk/uploads/1/3/1/3/131398008/d4309bb6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/kaxetageworezatix.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/25214231638.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/barunuvijoloname.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/rowuwilum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/59736087359.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/37359688451.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/bitononiwidofometegupetat.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/76106400339.pdf
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/60572512501.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/28528571581.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/97251458463.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/21338905520.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_off0000709b.bin
a939db39d87ab8cbdfcb808dbfc5210bb6a5d892886607b297ed019a78a4e50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 5096 bytes
font_01_sfnt_off000081ba.bin
d5988701de383b952ffdfa0c6c59ad30f46d5547e04443285c64717d0c477f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 13372 bytes

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