Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31d5d093132b423…

MALICIOUS

PDF

53.2 KB Created: 2020-08-10 09:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb921376ddc57d38fdddf40c9c3ac53 SHA-1: 8a1019117adfcb9cbfda1f944d7122e63b9e15b2 SHA-256: e31d5d093132b4235fd689c4bf02a2cfa710cc0baa2b7d43f2d9912c75da67e2
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which is designed to lure users to 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=how+to+edit+pdf+file+for+free+online
    • http://files.slebandboosters.com/uploads/1/3/0/7/130775868/wuworamu.pdf
    • http://files.wolfesearchgroup.com/uploads/1/3/1/3/131381919/785107.pdf
    • http://files.srasacramento.com/uploads/1/3/1/6/131606480/e551b931163.pdf
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/beclomethasone_dipropionate_davis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/98030648765.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/peter_pan_jr_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/tivimunemuver.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/zigomatefun.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/katalog_panasonic.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/lukekekugomigero.pdf
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/konafujenerewujeganadidaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/64666190912.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/kimexidavajudabigetubago.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/gusadupenakugusazaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/zoretudazemopipe.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000784c.bin
5976d1fb5f6b3e9ad2d9c8b4cc91aa1b48e26c8e044ad2b5f947b483c457f3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 4700 bytes
font_01_sfnt_off00008869.bin
ff0525b5de42e8f4e429eb857f7e65a0f50e1c93ea17f2c1812a3b31451e5763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 10260 bytes
font_02_sfnt_off0000abcd.bin
4f491b426e726b1709328df020a8669bad7c46262c4535d69a727283bcf65940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABCD 17972 bytes

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