Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f0b2df975b3d6c…

MALICIOUS

PDF

41.9 KB Created: 2020-09-17 02:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb7bf45f4c35dda4c38aa8545682c6e SHA-1: 24a44810b5203b1311d5592b4b3b12f7750430a0 SHA-256: 78f0b2df975b3d6cc6df41b46f14cdfd35e036d348f95fb0249bd16d20b6d233
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, pointing to a URL that promises a modded application. The document body, though heavily obfuscated, contains references to the same URL and application name, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious redirector.

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.club/wix?keyword=subway+surfers+new+york+2014+mod+apk
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/pirate_costume_womens_diy.pdf
    • https://cdn.shopify.com/s/files/1/0459/8648/0285/files/30306091808.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/58117446392.pdf
    • https://acfff0cc-d0cb-43c7-a448-88e970875101.filesusr.com/ugd/cec570_b21cc2d74b734e0d91ec298bc2719d66.pdf?index=true
    • https://8b7bf1ad-cc3e-4ae2-abc6-5a45fbc4b969.filesusr.com/ugd/d902bb_bd116b1c0a0942729e1ccf61741dfe1b.pdf?index=true
    • https://5ffb6f4d-4c62-443e-8dc0-e0866ed75cfa.filesusr.com/ugd/957eb4_00e5715e433e4f97a99aaeaa87ef90d2.pdf?index=true
    • https://44b1d61f-abf5-43ad-a83c-59497bc2ac91.filesusr.com/ugd/d31907_5db3ac7a7a1c4a3cbb3ef386c2f95ebb.pdf?index=true
    • https://e55e2bf2-c9ae-479e-87e7-993ecffadf5a.filesusr.com/ugd/90423f_e4ef0cf50f3a4f858a901e557959e147.pdf?index=true
    • https://6d17fbda-a6e3-4449-83b6-028b9e5b7a06.filesusr.com/ugd/bb05c1_f67464c5823a4f73a65d68c185cd1d43.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004961.bin
6cb708449571598c016748b7d06cf302eccbf8e0ff33cf2c3436b68ce0d17a8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4961 6068 bytes
font_01_sfnt_off00005e1a.bin
bad514fc8b29b53cd64c8952ea69a21cfae19f41b2b54378460238ddff5bd829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1A 10276 bytes
font_02_sfnt_off00008183.bin
61be83c1d932780d35a1f37f7fc9949ee0ebad30bad95804a354a4df13d731af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 17456 bytes

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