Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d77485c46659bd5…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 14:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05403606a7298955555a3847d8b4887 SHA-1: 4b4c083dc15f1c01fab937f5392f1c24ae9bc9ab SHA-256: 3d77485c46659bd5fbd747eda6d4e5908520695973cee58f540536d9306f5d73
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to sheet music, likely serving as a lure. The primary malicious URL identified is ttraff.cc, which redirects to other potentially malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the redirection attack pattern.

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.cc/pify?keyword=beginner+christmas+piano+sheet+music+pdf
    • http://files.twistedtangerine.com/uploads/1/3/1/4/131438567/lewizimopef_jobizibejuk_dojutevaba.pdf
    • http://files.benedictarenee.com/uploads/1/3/1/0/131070938/bopeli.pdf
    • http://files.n947rv.com/uploads/1/3/0/9/130969426/pemupika_nazodinewude_pazewalewibal_polusamorumafab.pdf
    • http://files.n947rv
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/salex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/1702503143.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/sanavolupav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/wopuwavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/34804896640.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/bamub.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/37692308548.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/tuzatovato.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/liberemipevevab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7323/1258/files/guduvigimojagigaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/76472160386.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_off000078b0.bin
5b22f5a2ebcdbe4b825c36d41c2bef7bbf870fd97e42989f63f4cd610060f167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B0 5468 bytes
font_01_sfnt_off00008b13.bin
94893d47bd9e6b7991b5c60abae192d8d247adac4936875d9f641016a303d33b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 10088 bytes

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