Malicious PDF — malware analysis report

Static analysis result for SHA-256 acaef813fbe8ec2c…

MALICIOUS

PDF

38.3 KB Created: 2020-07-25 10:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 981d2478754dc8be38eb0a009daf63e6 SHA-1: 20b7aaee8f147d9e1067fdc733170532441e6f7f SHA-256: acaef813fbe8ec2c5cf2a691ed5e320cb9197a02dbd49269237cf598fed7808d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure for social media engagement.

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=facebook+like+icon+free
    • http://files.michaelrlado.net/uploads/1/3/0/8/130814345/84968f914d31c1.pdf
    • http://files.nativedivacreations.com/uploads/1/3/1/6/131606951/1474328.pdf
    • http://files.abbotswoodaction.org/uploads/1/3/2/7/132740350/lotoso_tewex_tabapirabuwit.pdf
    • http://files.eraseair.net/uploads/1/3/0/7/130739510/dinasesebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/29152317607.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/jufovafulurux.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/kejonutuvivilefaxogifu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/5682739548.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/zojosizokixatezajokumisow.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/70353785459.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/50526812818.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/jusijulepesam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/45951849625.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/36803161695.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/gedowemoximajuraxafuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/0323/8811/files/50802004322.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_off00005b02.bin
c76f87e3a32bb7bc49c16d8e43c7900321a2d1735e62b24127710210009dd7dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B02 4564 bytes
font_01_sfnt_off00006a82.bin
0b758a6a063aec856efdf091aa17b3f798a107a30639adbae09e2ebf8cf7522d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 9884 bytes

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