Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b7db152c642720…

MALICIOUS

PDF

55.1 KB Created: 2020-10-15 12:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 658565bf5398fc3b2c7488326ab2f797 SHA-1: 604e339387f4875a415b7176777dfd4aff14d7d2 SHA-256: 40b7db152c642720c8800b3dc4cd64e228ef6f4d4b1d2847e8fd29353413fcad
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirect to known malicious infrastructure like 'gettraff.ru'. This indicates a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/123?keyword=power+and+authority+in+political+science+pdf In PDF document text
    • https://site-1038360.mozfiles.com/files/1038360/fusudixixitajemivoge.pdfIn PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/76200694732.pdfIn PDF document text
    • https://site-1041845.mozfiles.com/files/1041845/viradogepu.pdfIn PDF document text
    • https://site-1039188.mozfiles.com/files/1039188/3227826893.pdfIn PDF document text
    • https://site-1043051.mozfiles.com/files/1043051/raxezexavulometiduma.pdfIn PDF document text
    • https://site-1041286.mozfiles.com/files/1041286/60458906193.pdfIn PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/69196198813.pdfIn PDF document text
    • https://site-1038715.mozfiles.com/files/1038715/bilelatodudapewile.pdfIn PDF document text
    • https://site-1040171.mozfiles.com/files/1040171/loja_handbook_park_shopping.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/segifelesilokunuva.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f878098cdf0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8752663a8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f880019a7ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f871510e380a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f87d062e47fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1cc112ba-267b-40fb-89cf-8a3579bae613/monurosagubugenofukiliza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23dc8d7c-74be-4446-a949-13b50f5bf861/gogeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e954c09a-a198-422a-bac6-28981db7c22a/zuweni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d6fc9d-aad5-4a97-9a0c-06c737d7d755/puwetebazovubad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724be35e-f471-4608-a2cf-16426b1398e7/nidudugenukifewaribojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94716249-42ec-41c6-b488-93f528615dcb/rewufumavotemobilorur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98aa0dbc-efb9-4490-ab42-1d4bf7c5934c/vewizexizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1491136d-326e-468a-aa06-c168d08fba0e/43336578949.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 5320 bytes
SHA-256: b10f7d55eaf29ee4ea1c99c426af584e5b14dd829a75034b55b5b51986bdc4be
font_01_sfnt_off00008ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF0 14816 bytes
SHA-256: 9cd52446d9bc79815f0df4cd802bda33c7f572db9306f9368f667a455e558f4c
font_02_sfnt_off0000bdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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