Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d094cad319a3ea8…

MALICIOUS

PDF

43.6 KB Created: 2020-10-28 18:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5c9d36f1971f6e492f59a8cd3213e8c1 SHA-1: eca084de668229aa0c540db08a4a52c9a9bf1b49 SHA-256: 1d094cad319a3ea85ebe2646bff518bc80efa5e8cc88c7ed6b692a1d771f72b0
184 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the structure and heuristics strongly suggest the document's purpose is to lure users to malicious sites or distribute further malicious content.

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.cc/123?keyword=judkins+middle+school+principal In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/kujulosumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5f97b7725fb6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8b856de51ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f886d5335c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f870261cef29.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/2796454.pdfIn PDF document text
    • https://wugemevafiditi.weebly.com/uploads/1/3/4/3/134382928/kuxerotabutedi_janolup_risafiwu_neweleni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_5f9735c6a81ad.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/sobibizagavubuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5f8c994444dbd.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/puwemesud.pdfIn PDF document text
    • https://pawuxadatunu.weebly.com/uploads/1/3/4/2/134266652/piraki-sibujagirave-vebop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8714f0f27e7.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/351def06.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/2f0c6c825dc18fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f94dfb637881.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/fovinulemutufejelawi.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/jazofi/biblia_catolica_latinoamericana_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/sawefikakulowejopuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4084/5219/files/the_scientific_revolution_assessment_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/55734704332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3757/5326/files/76855666062.pdfIn PDF document text
    • http://��l��nky.orlandosentinel.com/2010-08-14/news/os-ninth-graders-stumble-081510-20100814_1_ninth-graders-middle-schools-In 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_off00006beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEB 5368 bytes
SHA-256: 42eefacf3b6fcfb17af9fb357c44e223b22eed35ac909f420dbb105e4ffc7bb1
font_01_sfnt_off00007dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 10564 bytes
SHA-256: 36160bed980731a418fb30a491f715a9789604df3ccfbf6e1faf4277b67964f0