Malicious PDF — malware analysis report

Static analysis result for SHA-256 be16441d3682c64e…

MALICIOUS

PDF

42.4 KB Created: 2020-11-04 07:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 20e08bebced4fa3dfaf94030f6ecb1ed SHA-1: 4afbfe95db907471658760167ab916651f4ab5b4 SHA-256: be16441d3682c64ee71369f7ece964a0f4bd84ac1e736ecf4f3819338f362d34
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed for SEO manipulation. The document body, though partially corrupted, contains the URL 'https://ggtraff.ru/123?keyword=logistic+regression+plot+python', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of 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://ggtraff.ru/123?keyword=logistic+regression+plot+python In PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/4462970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f851aecd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_5f99db3250724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f8895dbd994e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f8bb80a2a2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fa0bdb04f346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8f4f17bd391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f8ec17981a2c.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/duvudijowi_zopopafumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f9ad6ab8f1dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f8943386b886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8c60f14ab36.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/1/0496/5105/6804/files/the_torture_game_3_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae04f97-e915-4b58-881d-19e4fcccc78d/3944755717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6781/5066/files/jcp_store_closings_list_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb84759-6cb5-4712-8bc3-bfb5c203eeb4/petavulemirudinabu.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_off000067ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67ED 5028 bytes
SHA-256: 61a262eed3f276f70217aba7a109ab3e2f1ed166b77b9f3341eb05afd7b240a5
font_01_sfnt_off00007917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 10436 bytes
SHA-256: 50ef05c6fb125d9aa27f091796f7ad18f91a42685a5a588ef40fba99ca4578b8

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