Malicious PDF — malware analysis report

Static analysis result for SHA-256 4698d4fc89de33ee…

MALICIOUS

PDF

49.2 KB Created: 2020-10-26 19:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 26449080e25820d8d7f828285d26d9fc SHA-1: 1e6fdb58b96d7e84381147fd62957d2dd8d68903 SHA-256: 4698d4fc89de33ee75bf531d0d5f6e1d8c0ece29a1d438bc066ba420799e6bb1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL and text suggesting a lure related to a legal notice. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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://ttraff.com/123?keyword=3+day+notice+to+quit+iowa In 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/47f0f073-7ce3-4507-b924-954d9296c117/rejozasedikerijewati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcdd5f60-02fa-4665-a2ef-f6121bda6be8/46986119818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a78f6d-2b35-4593-8f72-a36f7e2ac728/mamalilifov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6425/2821/files/emporio_armanis_connected_android_wear_2.0_smartwatch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/sukizusekavapupoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d55348c-235b-496e-9d24-513e624c2fc1/50904680314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe4eae2-cf8e-4b1c-95e3-2cd4d0be12dc/kebibufelawutidojikidob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5952/8355/files/rofosizifanebepuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4936/9759/files/dual_monitor_graphics_card_and_motherboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7874/5756/files/gupawazoponimulumav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12276d58-5fff-49e2-ab9c-588cfb8841a3/aquamarine_full_movie_online_free_no_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9fd2984-d7f9-4325-806d-f2b266d83ce2/new_lenox_metra_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c6ae48-c86c-415c-ac22-fcd3e06aac88/29177412200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216a480a-6fb2-439e-9537-eafe27793f11/pampered_chef_grill_press_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcb1acd-e5cb-422d-a44b-221ac9662971/sasegejanuwovefuwovokatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae8813b-a345-4342-83b4-113890f258b7/jidob.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_off000081f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F4 5016 bytes
SHA-256: e0f742e57711c3b584bb193fc791167c248c635e22a913510493867335430b25
font_01_sfnt_off00009329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9329 10844 bytes
SHA-256: edac695c29035d50f6b07232c96b2d4242b2bd1716ee267fe571774144dbfb01

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