Malicious PDF — malware analysis report

Static analysis result for SHA-256 364e5cdb4699b4bb…

MALICIOUS

PDF

40.5 KB Created: 2020-09-03 08:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33b573ad06e9c49530222021fb8f321e SHA-1: 0d13ece5a7454a1c735cfbd920e970b8dc2566a3 SHA-256: 364e5cdb4699b4bb2ea93deb5ababe4dbae72bcc50e16a5a25c0d37ee4b465b9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=beatbox+music+free'. The document body also contains this URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness, and the presence of numerous SEO-optimized PDF links points to a link-farming or redirection strategy. No scripts were extracted from this sample.

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=beatbox+music+free
    • https://static.usrfiles.com/ugd/e4ff69_4b49709c8e934ab1938a800205f4992f.pdf
    • https://static.usrfiles.com/ugd/09273f_4ace93c8c6dc469a9d77fed1a13a9a20.pdf
    • https://static.usrfiles.com/ugd/89064d_d328a28c85ad4da49fe46114d56da844.pdf
    • https://static.usrfiles.com/ugd/b8c837_177931efe49c486783dce7cb869685ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/x-_ua-_compatible.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8522/files/36395734445.pdf
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/character_sketch_of_bassanio_in_merchant_of_venice.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/anatomy_knee_joint.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/fotabajowaxapokij.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/nisakesipex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/wowebusivugifowapipu.pdf
    • https://static.usrfiles.com/ugd/299074_319b5b1a3df9495d9f7905f573867ee0.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_af6382ba41e74fc7986d1de91eb553b1.pdf
    • https://static.usrfiles.com/ugd/07ef24_c5c9f0877ead42b1883169d773e84af9.pdf
    • https://static.usrfiles.com/ugd/c1108c_41420d8dc30249679f14b413d451c363.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_off000053fa.bin
bfa4739f6241fd5f44a30ec4df6660d44f8c992bf6b39dc8ea8c44ef203fd10b
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FA 5252 bytes
font_01_sfnt_off000065cb.bin
4e7a2d878129d733177a41fca8715b94898355f7e08034dc1714177580f5ea3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 15396 bytes