Malicious PDF — malware analysis report

Static analysis result for SHA-256 478780e78334cbf5…

MALICIOUS

PDF

89.7 KB Created: 2020-10-29 22:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e7e35c0d76f6359cd49a908d5eea15f8 SHA-1: dc6182dd60b21bf054d17000395fb77adc95adb1 SHA-256: 478780e78334cbf5f10ab19fedd5b770ba2feb1a378f5e01828d19a5d33026a7
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/aws?keyword=temas+para+programas+de+radio+catolicos'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to lure the user to this malicious site.

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 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://ggtraff.ru/aws?keyword=temas+para+programas+de+radio+catolicos In PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/lovudujapud.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/daxipixomep.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/kogesopifati-lajizalotiza.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/rezebelim.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/1733051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8862bfdb8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f8a2c95d580f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/levovod/darusozosolozimotolufofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4414/1732/files/30355340062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4314/1812/files/one_direction_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/aditya_hridayam_sanskrit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/english_alphabet_writing_practice_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/download_rooted_android_emulator_for_pc.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_off00011e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1F 5340 bytes
SHA-256: 7b4df9e7e5926af88fbd87c399568ac5ee2851e59dbf0ee5fb1990e5171781d8
font_01_sfnt_off0001302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302F 12080 bytes
SHA-256: 798aa041ec7357a6c63d06e0e587674a1b85c8576b4c58d62427f762c8fa5cf3

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