Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b1f2bc9a9ec8f2…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 00:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e94ef563b8b30718261dcc7f5a58660b SHA-1: 4527b1028e3ac1593399d7f2f948d8fedac6c4c4 SHA-256: e1b1f2bc9a9ec8f28e9af445594d7313975abde5ae80bbdba465ca0bda31ec16
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/wix?keyword=reiki+niveau+1+pdf'. The document body, though heavily garbled, contains the same URL and text suggesting a lure related to 'Reiki niveau 1 pdf'. The presence of numerous other PDF links, many hosted on 'static.usrfiles.com', indicates a link farm strategy, likely to improve search engine ranking and distribute malicious content. 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.com/wix?keyword=reiki+niveau+1+pdf
    • https://static.usrfiles.com/ugd/b8c837_f0a1acd69a744bdc87d22a4cbe0bff06.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_b440696a9b534dd4b2228d86cbfbd546.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad506e16d354203ab18ad88794e9d11.pdf
    • https://static.usrfiles.com/ugd/b444d4_aa3063f84cd14874a8f2a4ef88ffa2f0.pdf
    • https://static.usrfiles.com/ugd/0d002d_bba6c307b0d44057ad701a08592f726e.pdf
    • https://cdn.shopify.com/s/files/1/0430/4915/6757/files/tenibodosovaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/17066737045.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/kaplan_nursing_school_entrance_exams.pdf
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/buzasezanonuzevufigulaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/17433129988.pdf
    • https://cdn.shopify.com/s/files/1/0432/2872/5405/files/como_funciona_la_musica_david_byrne_resumen.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/jozutumadumosagajurijesa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/nujeragasaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_32307e46f22b4d13a12dade640d34f83.pdf
    • https://static.usrfiles.com/ugd/55f640_7e73020865704f5388fbcecf71bbcb04.pdf
    • https://static.usrfiles.com/ugd/df4650_624a379e35c94dc3b79a1954869116a0.pdf
    • https://static.usrfiles.com/ugd/e2f197_118a208555d94d59a9439a98845020a0.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063fa.bin
9d578d4d159d49b76c281624e8723c132ef580aaa521bbf8958e4450b58eda48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 4604 bytes
font_01_sfnt_off000073bb.bin
236a851d3a78b7365c4e0b4ec989a170f90cf6630fdb311a05efc6083f30fd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BB 12440 bytes
font_02_sfnt_off00009af0.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 16164 bytes
font_03_sfnt_off0000afe9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE9 4324 bytes

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