Malicious PDF — malware analysis report

Static analysis result for SHA-256 1407cddd537bc506…

MALICIOUS

PDF

52.2 KB Created: 2020-10-16 12:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 11d3df8fbaad283bcc8583a92632327a SHA-1: 2dc0e615337cc68ce011f517af1b1268a08751f1 SHA-256: 1407cddd537bc506edb4e0ed9cfe51c2882838875cd39c9c6b5961df81965dc7
184 Risk Score

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://ggtraff.ru/strik?keyword=refuge+terry+tempest+williams+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f88c7e7975c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f87673a5b151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f874953c8e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f872495c5495.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/jajaluxuno_pelikigexexamo_padilu_kepiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f88662dc82cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f895869ba3e6.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/badeluzasezorak-tasowatiwefij-xapojefasij.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/9ecdb799a4e.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/safado-fodidunixoso.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9fa7699.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/7281353.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/2662099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7905/0438/files/hustle_castle_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/60149974206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/bolugezujozasiwedak.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_off00008d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D68 5560 bytes
SHA-256: ac81c10e8838c26010976989156e35dd5ed308c6f792934d767d01474ad5d1f3
font_01_sfnt_off0000a056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA056 10404 bytes
SHA-256: c2a5721c5d59d941a65628916290c2f85db01e44c4fc8911fdafdb41b676a6db

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