Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c32380b28b57a4…

MALICIOUS

PDF

38.9 KB Created: 2020-10-26 17:58:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 23cf67c5a420216fa15503db35dbd695 SHA-1: 814b21f8751cf557d5ef61e9bf4e4a1adc9d541b SHA-256: 79c32380b28b57a4b9e918fcfcc405ba0a616331ad31f0ebf5a916ee7db4e9d9
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting and redirectors, indicating a link farm designed for SEO manipulation or malicious redirection. One prominent link, 'https://ttraff.link/123?keyword=urdu+romantic+novels+download+in+pdf', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to downloading novels, suggesting a lure to trick users into clicking the malicious link.

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://ttraff.link/123?keyword=urdu+romantic+novels+download+in+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5f94bf2d3f032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_5f94e21140062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f8e12a67a5ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f91fa2da2263.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/2fa37fcd9c8.pdfIn PDF document text
    • https://gogekelonirivi.weebly.com/uploads/1/3/4/4/134438841/7257584.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/208737.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/639e64ce.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/zasorul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/395a4db7-c03d-43f3-bc30-cbee89a22b3a/kpek_sesi_mp3_indir_dur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f515a9e-76df-4cc8-92fb-f82156501a7a/wixiwuvivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc565ea-a717-4812-848d-207ad74e282f/nuvipodepitewimozelipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001eaeed-7911-42bb-b483-2bd0d55f6b14/terurokibakafuxedufupodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e656f4fd-1ad8-4c77-acbc-bdb7ef933a9b/zunuked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9325/7112/files/memuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4312/5917/files/bus_166_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/determine_the_moment_of_inertia_of_the_shaded_area_about_the_y_axis._given_h3.7_and_a1.4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6694/9269/files/trait_and_factor_theory_of_career_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/basic_computer_knowledge_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/asme_bpvc_section_ix_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/tamipobavuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/interview_questions_and_answers_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/problems_of_inter_ethnic_relations_in_nigeria.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_off00005980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5980 5444 bytes
SHA-256: 03eda65548e14344f5872d193da8651327dc58a0c04ef7e609100e0a3f508bae
font_01_sfnt_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 10060 bytes
SHA-256: af171271fc37ccb29d1a7cbc16e2de21bfff980e8553bfeca0f4d6db3419dc7c