Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9343246bd820eaa…

MALICIOUS

PDF

54.9 KB Created: 2020-10-17 16:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ec461c66fe1670f65fef56c48f2d1f7 SHA-1: f6fc0b4e4b9b67d4ae55dcc73b40027fb1b2a77f SHA-256: d9343246bd820eaa981dd36e555da697cfc8c0ffe0f16520470e133c0009311e
184 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The document body, though heavily obfuscated, contains keywords related to 'Android tv box' and a URL that is also present in the heuristics, indicating a lure for users. The presence of numerous links suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/123?keyword=android+tv+box+canada+fully+loaded In PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/45d8126b48b3c.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/55e32409.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/1615ed3.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/9702144.pdfIn PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/didigex.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/1077656.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/2703502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f883512e3112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8945b3d4e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f8829743cfc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8a2c93e5a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f873ca0a2010.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/butujekinol.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/a2e91a44a164ef.pdfIn PDF document text
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/2202578.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2323/2924/files/string_on_ukulele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0524/6112/files/atomic_radius_of_aluminium_is_smaller_than_magnesium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/the_prodigal_god.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2466/0664/files/49879438065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4517/3413/files/tibuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582ca5f5-0ce3-4639-90c2-15429327d619/makakozelaxeretazosajudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df14841a-52a7-4c43-9a04-148070699a6f/bedonoxenigujowif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c271e25-7214-4035-a15d-76579ca6285e/25830155978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79dcf1c0-ae68-4d58-ab92-9b184669f941/xadaziji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe5f973b-0879-4616-8c4f-ea33f25fb670/78590094170.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97ED 5196 bytes
SHA-256: 172f2723c87f71bf8fe46877f26424b182c4a98387c053eede293da266de7b54
font_01_sfnt_off0000a9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B3 10540 bytes
SHA-256: 9ad055164a3675ffc69f28e3c185d9c6ed31b4889f049e619cc1320d9af47bd6

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