Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3474c3a01081150…

MALICIOUS

PDF

34.8 KB Created: 2020-09-01 09:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18451963f517cd71e3478af12d84d6b2 SHA-1: 637552be1dd3349dc7619d074c04d9016b9d4581 SHA-256: b3474c3a01081150bd7c47c322af4028a576e4988a87ed0d1c37976ac9805b23
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a weather report and the malicious URL. The primary attack vector appears to be directing the user to the ttraff.cc domain, which is flagged as malicious. No scripts were extracted, limiting the analysis of further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=weather+report+for+elizabethton+tn
    • https://static.usrfiles.com/ugd/b8c837_5b6756c8665f43999b1f49f72218db5a.pdf
    • https://static.usrfiles.com/ugd/c0fca2_e3d10c0a71fc4fe8a66332a910e5ee14.pdf
    • https://static.usrfiles.com/ugd/b8c837_d67b4c963fb44659a47360a24d2ee498.pdf
    • https://static.usrfiles.com/ugd/45e30f_8f46867ecc76480591ae75dae669c458.pdf
    • https://static.usrfiles.com/ugd/5ed537_f90d4f1b47ad43699916cc264a1406ee.pdf
    • https://static.usrfiles.com/ugd/d4579c_2d294d2dc9704d718ba2bf7492175b55.pdf
    • https://static.usrfiles.com/ugd/e3325f_ec1ed9b5d35f44beaedb760c269cf447.pdf
    • https://static.usrfiles.com/ugd/9c43ec_b6b37ed6aa354d60aec0115a21c7f358.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/1046100742.pdf
    • https://cdn.shopify.com/s/files/1/0469/0133/0082/files/learn_to_earn.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/49930986949.pdf
    • https://static.usrfiles.com/ugd/2f8cea_5ec0b34c7ed246c492f8b6f51369447b.pdf
    • https://static.usrfiles.com/ugd/963627_2112bf3e47af4c0882ce619db5c033b4.pdf
    • https://static.usrfiles.com/ugd/5ad03d_eaf163e834cf4835a5fbf9f786a04afd.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_off00004c6d.bin
41f6cbc4da2b30a3e2992e3c2912f00b855f224334901b289f4b93b6d364c0e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6D 5016 bytes
font_01_sfnt_off00005d8a.bin
b9cfc587dc8e3e3d2a7ca960501d0817a418d90c085e0f6477102d21e19b915d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 9608 bytes