Malicious PDF — malware analysis report

Static analysis result for SHA-256 b597421864593e59…

MALICIOUS

PDF

56.1 KB Created: 2020-10-31 02:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de41642d4bd2244daeb4bf9e54a21062 SHA-1: e55c4d1d524baf0128dcef8d2dce582aa3509d77 SHA-256: b597421864593e5911e5078a366f668ca4971e7a9296b6ac31d148809bcda72f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link disguised as a power supply manual, which is a common lure for phishing or SEO poisoning attacks. The ML classifier strongly indicated maliciousness. Although no scripts were extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious infrastructure.

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/123?keyword=astron+rs-12a+power+supply+manual In PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/gaxawuxezije.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/4599586.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/760b60d6-06d2-455a-8bb5-ce4bc3e82165/airport_line_septa_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825b8ed9-18eb-4f60-a153-f8d7f8c14e5f/96915317869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0be4fd-c759-4e77-a43d-d7d791a17951/65620969681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8962dd6e-211b-4c09-a34c-a7686d89c1a2/20576985411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec58675-0695-4175-b006-05511853b347/american_government_power_and_purpo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4956/4351/files/word_equations_worksheet_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4690/7303/files/woody_guthrie_i_aint_got_no_home_old_man_trump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8f5052-3ea1-4adc-a223-43d4084bc3ae/hiit_workout_routine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8302/3772/files/disupufikor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76d2d8a-efb9-4217-b1ba-dfd26ce3fe3c/tibuferuxadulatejepifel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a5f703-abb9-465c-868b-b45ae1890dee/gazava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0490/2557/files/darakafarizikoju.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_off00009ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE8 5364 bytes
SHA-256: 16dfffcc145633ac59b5dadb2233946dbe766b91a7759c697e4e8d0d5d493d58
font_01_sfnt_off0000ad34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD34 11172 bytes
SHA-256: 9c1966e2e27c374175e32d460ff966947fde54fc0fc6b6130e77c7ba1ca1173c

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