Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e3dce0a07d136b…

MALICIOUS

PDF

44.9 KB Created: 2020-09-16 17:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df85693879dbd87ce79cd50ee1048ba5 SHA-1: 17c1682c7bebda53c12e733daaca52844e3c70f6 SHA-256: 08e3dce0a07d136bec9c2bfd24b1accb1d460e3f2dd5b4b01b583d0cc0ff2e2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious link identified is https://ttraff.me/wix?keyword=jb+driving+school+lagos, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user into clicking it. The presence of numerous other PDF links indicates a link farm or a similar tactic to obscure the malicious destination.

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.me/wix?keyword=jb+driving+school+lagos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bdb26303-795b-42bb-8b26-c88a16b42170.filesusr.com/ugd/1e52da_a3cec294a23f441b91f700d24026f2b2.pdf?index=true
    • https://f8d0f44c-25a0-4ca5-b06d-6bdc3b4c4336.filesusr.com/ugd/dcf311_e35930474a854d909e277cd7fefdefc3.pdf?index=true
    • https://73ae0315-188d-4244-8b59-153900ab6d91.filesusr.com/ugd/b463f2_28e5663a4e034dc39d952fd66d051664.pdf?index=true
    • https://ed6bed3c-7e75-46c6-a6e4-b2af1fd78152.filesusr.com/ugd/a2de88_dfafb76d6b2f4000bc5aeb5c314b475d.pdf?index=true
    • https://064c4c64-352d-4f3f-9a02-ee782fec9b4e.filesusr.com/ugd/405339_15d91cc5026848faafe613ef7997309b.pdf?index=true
    • https://38f20773-75da-4e02-8a40-934bf615f82a.filesusr.com/ugd/64bd79_0d5c72a273d14210a21fe11d83d825c6.pdf?index=true
    • https://47608300-8590-46b4-9fe4-1dc8e3843566.filesusr.com/ugd/9d869b_332dec52176c4e09a31fbd07ca505b4d.pdf?index=true
    • https://19de345c-babf-4a5a-a0db-09b7869cfe75.filesusr.com/ugd/738632_9afbeb6df0e9455eba05608f699c027c.pdf?index=true
    • https://49929e0d-7a68-4aa8-a445-95f5953e9119.filesusr.com/ugd/d93890_0a9fbfc48a8f4c5bb7378e3484e6a365.pdf?index=true
    • https://17bd7c29-b442-41ae-89d9-2f5937243e85.filesusr.com/ugd/e643da_de780a1963e449828a189410498b4928.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/75145375319.pdf
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/abordagem_triangular.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/sql_database_32_bit.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fab.bin
f4f885c375f9c8451c9057da3dbbf595d3c754bb37646b28d542382d697a89c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 5392 bytes
font_01_sfnt_off000081ff.bin
75ed5df75641de12456ffe4321bf2efb46ad72f9fb19d7bc86fc6cfcfd522e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 10912 bytes

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