Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb40c6fe6dcb30b…

MALICIOUS

PDF

46.3 KB Created: 2020-10-14 19:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 43dafe4fde3b786cc321d9f16c502ba7 SHA-1: bc621d964c95131c4503003c68f8452e13e29989 SHA-256: adb40c6fe6dcb30ba8a2c5a49a3d9e38ce35a011b157d963d424b7dd9c397c89
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'hotstar tv apk download'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules indicate it's a redirector and part of a link farm. While no scripts were extracted, the presence of malicious URLs and the ML score suggest a phishing or malware distribution attempt.

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://cctraff.ru/pify?keyword=hotstar+tv+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f871afc5519b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f87246fc3bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870053e9e6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f871bf7b22f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f87193bcbe0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f87257c502e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8710c2966a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f8718425a0c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f870077414a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f86fd4e4c524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f8700830dfa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86f436280d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9bb35f0-2a64-4c80-ba2b-cb23e55bfc2d/bexogaxaridoguponusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0245/2935/files/53163497599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3293/2252/files/35245691946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2435/0873/files/zejuvamofuwigaduxozadavof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9523/7813/files/12990276901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/padidanibovozezebew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7842/6007/files/geometry_resource_book_answer_key.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_off00007715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 5128 bytes
SHA-256: 6a4fb15eab73ee19bfaa6f19c5cabdfd432ff2e862102ae40038862a4c290f87
font_01_sfnt_off000088a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 10408 bytes
SHA-256: 5db6f1edc23886c3dc03aee16114b743947f420ce28551245d161b8732a1ee7b

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