Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d2db805af6a7b2…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 19:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95ed919eb58edfc4bbcc01099fd99700 SHA-1: d5c8402e985e258932ecf017f80523df5a093958 SHA-256: 61d2db805af6a7b2b00d87d363a72d84f25a806620a89e048d0290dd429db2ba
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/wix?keyword=bhoot+uncle+movie+video+songs`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is `https://cdn.shopify.com/s/files/1/0433/2004/9822/files/47343676403.pdf`. The ML classifier strongly flagged this PDF as malicious, suggesting an intent to redirect users to harmful content, likely for phishing or malware distribution.

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=bhoot+uncle+movie+video+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/47343676403.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/freeze_excel_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/76059006307.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/67133149938.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0929/files/definition_of_validity_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/23674030028.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/20686471520.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5978/files/96094072483.pdf
    • https://static.usrfiles.com/ugd/05900a_e4842b7ff27a41c1b50c7bd7146574d4.pdf
    • https://static.usrfiles.com/ugd/a43ec6_cdc92b0147764a359d96e5164c654305.pdf
    • https://static.usrfiles.com/ugd/ce5d00_dac4027b273a494b928170409a7fff39.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b6e61671bf14258ab38b24dae5e0cb3.pdf
    • https://static.usrfiles.com/ugd/76de1a_20b2bfe6a1d44435801061acb4692537.pdf
    • https://static.usrfiles.com/ugd/ed64d2_4efd8c909c38437f810e83cc153a98ef.pdf
    • https://static.usrfiles.com/ugd/409ca8_b81ef709ae40453a806d2edb0d865d83.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cef.bin
40bc230441e213fa0d201f55f7a85d26497eb8f21e161c94aba6cba9b56f1b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CEF 5036 bytes
font_01_sfnt_off00005df2.bin
fc2d8f95780db93386ad80cc07bb54522230ab1d87fa8bfe055138288f96ab2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2 9968 bytes
font_02_sfnt_off0000801f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x801F 4324 bytes

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