Malicious PDF — malware analysis report

Static analysis result for SHA-256 62094ce44d2d3326…

MALICIOUS

PDF

97.0 KB Created: 2020-11-03 07:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2af539da056f017854dd5256961c17c4 SHA-1: 9f0cddec572e18be2b9028a682bb1d8c26775f09 SHA-256: 62094ce44d2d3326bd65b105acddd11ca24fda277e65361cd0fc56ebaf06f084
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious infrastructure. The document body itself is heavily obfuscated but contains the same URL, suggesting an attempt to disguise the malicious link as a search result. The presence of numerous other PDF links further indicates a link farm or SEO poisoning 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/aws?keyword=what+is+sulfur+a+nonmetal+or+metal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f8c8dbf612d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f873a4490abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5fa0aa6ea88c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c229f2-32f2-4762-8d4e-85330be63e92/vogozubizoxipovabedi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/rarobugejuzutejosipola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8385/5525/files/pathfinder_boon_companion_errata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ebddf5-b441-4fa5-97ec-54019fee2709/76915169748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/kunimazila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/7345/9116/files/introduction_to_managerial_accounting_5th_edition_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd8e5f4-1e83-4dfa-8516-1f17f71763ac/gemoxodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d8b995-8744-45f9-a6ab-499af78b1269/41245433180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7300/9327/files/android_studio_arrayadapter_spinner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/61358195835.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F09 3224 bytes
SHA-256: f4fa5f95077d3833f468afe006ff76595bdb32e3947b054f54e2cb31095cdaa1
font_01_sfnt_off00012a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8C 5020 bytes
SHA-256: 2aff4b0c465b480682a0361caa1d7791ccc481f82b3a897d003cdd43b2a04e72
font_02_sfnt_off00013b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7D 14440 bytes
SHA-256: 99a6042e27ec7bc2ea4dfa0aafa84ea5d349f5219d61234aab82ad3f2d655fb2
font_03_sfnt_off00016928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16928 2808 bytes
SHA-256: f5b75b611c12bdb8df75b37f3ad9445e8ea69eab76cb7f9f943910180bcb7dcb

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