Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a2d0d6e2a32a75…

MALICIOUS

PDF

43.4 KB Created: 2020-10-19 19:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 11ce93b64f1b79740abcb697774754cf SHA-1: 5d422e1312b7b05685f3b6d854856ef4d825863c SHA-256: b0a2d0d6e2a32a75fa0545f2f7cbd625c8b0728fc2c961a27f54910c499a6382
184 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure. The primary link, 'https://ttraff.me/123?keyword=figury+podobne+sprawdzian+3+gimnazjum+pdf', is identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious sites, likely for phishing or malware distribution, masquerading as a search result for educational material.

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.me/123?keyword=figury+podobne+sprawdzian+3+gimnazjum+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8bd9eaeea8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f88150276059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f875c6638f39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f8d3c084af6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8a864255bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f87e54f32d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8958a86cfc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8d4b3f95d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8cbb2faf6dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f88f6b61a394.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/depuxe.pdfIn PDF document text
    • https://derodaju.weebly.com/uploads/1/3/1/6/131606282/rawabevujoroj.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/razinemep_duvakitedikaz_wibenex_ferid.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/c0de4f5cd.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/nonalurutu.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/jujaxukupeka-lifem-katitetaz-nuvid.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/xusofaraguwuwipo.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/kesukalunugegeku.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/paberemete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f871b1221e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f8d1f832e921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f89c257219b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f8ced90a210c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f890e675d2d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000648a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 5908 bytes
SHA-256: d66af4e45c5aee60015cd6fa61854a618e39191be3c1afd86ab2e66c58338149
font_01_sfnt_off000078b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B8 11852 bytes
SHA-256: 43b2b3d3b10ba1796b86419273ed2fe89511381a8520a28babf144b5b46dee50