Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c33637b88d139cd…

MALICIOUS

PDF

46.9 KB Created: 2020-07-28 09:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fccf9bc805c508df2f502d458cf2679 SHA-1: 31b05bcfe97410dbcd52522cedb5286945abef92 SHA-256: 3c33637b88d139cd583e5b01605c1934818f5f56eeb0b70272c4f5b0dc6762ae
150 Risk Score

Malware Insights

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

The PDF file contains numerous links, identified as a link farm, designed to redirect users to external websites. One such redirector URL, 'https://ttraff.cc/pify?keyword=social+emotional+learning+worksheets+pdf', is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'social emotional learning worksheets pdf'. The presence of multiple Shopify-hosted PDF links further indicates a coordinated effort 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.cc/pify?keyword=social+emotional+learning+worksheets+pdf
    • http://files.nissajackman.org/uploads/1/3/0/7/130775295/guradarojatatos.pdf
    • http://files.neighbourhoodmassage.com/uploads/1/3/0/7/130739415/ccf52.pdf
    • http://files.busnbreakfast.com/uploads/1/3/1/6/131606670/piganodi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/xenorekadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/28828977986.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1758/files/rusumiwetibuzado.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/fevixoxovevabitabafolag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/ruvupibuxabaxekuxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/95923252159.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/86585460656.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/xixeraxunutazirorijive.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/gitewukef.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/
    • https://cdn.shopify.com/s/files/1/0429/2290/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf0.bin
fda7b1110e5957a0a1f8610f1abb0aa70ccccbfa3a264afa80d728d03c4a1742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 5616 bytes
font_01_sfnt_off00007fdb.bin
58be24595b2deb41ff209d2999b2e795dd7689d01d1ac1f725421e486ef5e40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 15196 bytes

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