Malicious PDF — malware analysis report

Static analysis result for SHA-256 254882b5aef04fa3…

MALICIOUS

PDF

36.3 KB Created: 2020-07-09 16:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0222406ae5c93bcf372f3195ba63677 SHA-1: 5e5f5087795849463b84284abba671b31135689f SHA-256: 254882b5aef04fa30cf7b5d24ef15824280956023820825e73bba0c229216324
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document is designed as a lure, masquerading as a BMW X1 brochure to trick users into clicking malicious links. The document contains a large number of embedded URLs pointing to various external sites, likely part of a link farm to distribute malware. The primary malicious redirector identified is ttraff.ru, which likely serves as the initial stage for delivering a secondary payload.

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.ru/wb?keyword=bmw%20x1%20brochure%20pdf%20italiano
    • http://files.ryanbrownmusic.com/uploads/1/3/0/8/130874123/telarazuzomitavixuv.pdf
    • http://files.weingartenlab.org/uploads/1/3/1/3/131381677/9059578.pdf
    • http://files.rashannaharmon.com/uploads/1/3/0/8/130873984/1807315.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdf
    • http://files.thecartoonersstudio.com/uploads/1/3/1/4/131482926/aae104d9.pdf
    • http://files.hipababy.com.au/uploads/1/3/0/9/130969830/mowagubevoga.pdf
    • http://files.logopedia-bg.com/uploads/1/3/2/3/132303138/1624316.pdf
    • http://files.sjuartdesign.com/uploads/1/3/1/6/131606087/wulixakitanajukaf.pdf
    • http://files.vitoshapartners.com/uploads/1/3/1/4/131438002/7614367.pdf
    • http://files.gemmablack.com/uploads/1/3/1/3/131383325/logovenimif_pipulu_zodekavejasebil_vuxigawune.pdf
    • https://fazupisis.files.wordpress.com/2020/06/rofuzukigunogulomovetuvu.pdf
    • https://pubixof.files.wordpress.com/2020/07/bupimaranujasulajufesaf.pdf
    • https://betifutilas.files.wordpress.com/2020/07/70627600745.pdf
    • https://zevepate.files.wordpress.com/2020/07/nonowinobabero.pdf
    • https://bimirofi.files.wordpress.com/2020/07/51579263229.pdf
    • https://zuwosubejobo.files.wordpress.com/2020/06/95053232273.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.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_off00005057.bin
caee5938c066a567a28cf04094e10ebed062f519c8341d468ec8c03bbd94208c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5057 5500 bytes
font_01_sfnt_off000062f1.bin
9e3faca63cb01fe4cdc14db1d28df0e921bf873d2c880663e9c18edcca578f8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 9708 bytes

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