Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26e0ef82caaaf1a…

MALICIOUS

PDF

51.4 KB Created: 2020-10-26 09:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 61bcc30a6401041fd22a7c04b4e92936 SHA-1: 3d44377471d0a82feb3ee8da5767de08554e7858 SHA-256: d26e0ef82caaaf1ad2d6a1e4089692c6dc4855044e1f58e3bf69b078577ebac2
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, disguised as a download for an Android app. The document body explicitly contains the URL 'https://ggtraff.ru/123?keyword=cell+phone+jammer+app+for+android+download' and numerous other PDF links, indicating a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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=cell+phone+jammer+app+for+android+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f875d7bd5bd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f91e9d024749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8c8dcf23cff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f8ea5815a4b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f9539ba55f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5f93595507ce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f89db06b0246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f91a9074f924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8f76c2185fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8e2a880e682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f8f6bfdca1ca.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/1/0483/8155/8933/files/putelukaminutapudozerad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/congestive_heart_failure_guidelines_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4090/5669/files/coleman_48_quart_cooler_combo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6845/9670/files/filetype_python_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5230/8906/files/lumuzuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/38158653528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/samugaliganukame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/dewazilujaxuzowubonodaso.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/kavutifeset.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/fivaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/mojenowibune.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/albert_camus_the_plague_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/30414677357.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_off00008856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8856 5176 bytes
SHA-256: bb8d378c92274c3fdb1ec88bf11c560c08b04be7c51880fff7aa284a15db480b
font_01_sfnt_off000099d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D7 11152 bytes
SHA-256: 2fbdbc06e185131bc4b6e90419a47bec4696491ef174b5be9a918b277becc65f

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