Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d1bb29878a0862…

MALICIOUS

PDF

44.4 KB Created: 2020-08-28 05:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5df742a76ab03fb71226451f7080c17 SHA-1: d45cd1157d007a0ad962aa9d90ed20ee10d0b4c6 SHA-256: 12d1bb29878a08627cbc868fe687fc9d0ba2a25468445fbb8c07ff903d4673d7
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. The document body, though heavily obfuscated, also contains URLs and references to cmd.com, suggesting an attempt to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.com/pify?keyword=kendo+techniques+pdf
    • http://pikotiveb.remotecmd.com/uploads/1/3/0/8/130874118/459f6d1b.pdf
    • http://files.suncityprides.org/uploads/1/3/2/6/132681969/fepodarafowovu.pdf
    • http://files.matchboxgreetings.com/uploads/1/3/1/8/131856987/gojapolizobufewes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/96023926290.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/45929028840.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/ginojifotubat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/mufero.pdf
    • https://cdn.shopify.com/s/files/1/0462/3918/7104/files/vue_template_html_element.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/24398247283.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/79899097623.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/31137246079.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/wubovoxuzadukebivokol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/zomoxakezez.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_off000071df.bin
ab65bf9b097f638cbe2385d4862889e0b2de9ba39dc39c651bed6c5ca98dd457		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DF 5000 bytes
font_01_sfnt_off000082e8.bin
bd9804545640b0b0b737abd22e0909409565b701cfd3713226a913080656eb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 10052 bytes

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