Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74f27e36436cee8…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 14:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b925c7deb39d10346be4b4cd1825e4b2 SHA-1: aa1e2790056e70a01f8fe1c030acf3fe81e433b8 SHA-256: e74f27e36436cee87be9f9a5c53fd695b543a2fa689a4a1369c66b8dbb631bb3
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=blank+formal+letter+template+ks2' is identified as a malicious redirector. The document body, though partially corrupted, contains text related to formal letter templates, suggesting a lure to disguise the malicious intent. The presence of numerous external links points towards an attempt to drive traffic to potentially harmful sites.

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=blank+formal+letter+template+ks2
    • http://files.grcrowfamily.com/uploads/1/3/1/0/131070190/3426f7e.pdf
    • http://files.douglaslynnwhite.com/uploads/1/3/1/6/131606492/2c0cddd2.pdf
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/17525431109.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/17082356596.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/nugawujomipena.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/99990258547.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/77206299375.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/jugaloreni.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/nitric_acid_msds_sigma.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/62563771314.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/canciones_acordes_guitarra.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_off00004e62.bin
ccf6a2f7397f9893f32ff6a3bc626c982c964a241583810c7f11e70b3d7a3752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E62 5292 bytes
font_01_sfnt_off00006050.bin
fac66c2f9b49d3da5ea59c73901beecd11eeab17849ca8f9da965137bb33073c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 10080 bytes

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