Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f0ab6f16318219…

MALICIOUS

PDF

37.2 KB Created: 2020-08-10 14:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f227c1315b13214e893840c45eb3532 SHA-1: dc4cd015e0fb866a314cb564a53101d41e590f90 SHA-256: 02f0ab6f163182195945ccf706524f6404f97326c27d47ac95a368c6e2a38e55
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, suggesting an attempt to drive traffic to malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a PDF, and also contains the malicious redirector URL. The presence of numerous embedded links and the ML classifier's high confidence score indicate malicious intent.

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/pify?keyword=spoken+english+malayalam+pdf+file+download
    • http://wirexisux.karenlouisejoneselementary.com/uploads/1/3/1/6/131636948/653520.pdf
    • http://lixesoti.7thsenseclothing.com/uploads/1/3/1/3/131380213/kekenosafobiwozuxo.pdf
    • http://pogopaj.ivepriest.org/uploads/1/3/0/9/130969723/mowavivuvuk_fugubakuwesomor_wapakuzuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/34752859159.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/pepugozasuwemoxogiko.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/stevie_ray_vaughan_autopsy.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/morrowind_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/wupipegemulajuvapip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/types_of_biomass_energy_sources.pdf
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/26861802431.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/14190610848.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/8908455956.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/woxituveragujipadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/58795073484.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/rizevewotirad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/laxoripota.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/fulare.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_off000047f8.bin
eed014f954324e41760c612dcdf171bfa4aa721bafeeb2826ce357f0e1fa7e10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47F8 5428 bytes
font_01_sfnt_off00005a52.bin
c5fd578a0482fc1ea1604e1c60047f37794094d7845963feacef9915a5d4ae16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A52 9132 bytes
font_02_sfnt_off00007981.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7981 4324 bytes

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