Malicious PDF — malware analysis report

Static analysis result for SHA-256 293350a0458986d5…

MALICIOUS

PDF

43.9 KB Created: 2020-10-15 19:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 34fe319c35bff5d5de4e8d7405d404ee SHA-1: 6d221518d726500b5a2c5046fc3437b085baba88 SHA-256: 293350a0458986d566142c0387d9052ed1c3af47a38de93795970a192953475f
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. One URL, 'https://gettraff.ru/123?keyword=analisis+oraciones+simples+4+eso+pdf', is explicitly flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/123?keyword=analisis+oraciones+simples+4+eso+pdf In PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/basadinanuronikinukodot.pdfIn PDF document text
    • https://site-1042020.mozfiles.com/files/1042020/nozikoroveb.pdfIn PDF document text
    • https://site-1040563.mozfiles.com/files/1040563/zegumajupabidenomenu.pdfIn PDF document text
    • https://site-1040317.mozfiles.com/files/1040317/45669996800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87d7768b9aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f885a5b6e34f.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/2703502.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/9506eb3ef.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/luwulif_zojen_lefoxer_gukoruvifurof.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/9fd55072845169.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/rexezigiwer.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/9225f5590a2.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/6070879.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/759977.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.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/1/0498/0054/4418/files/15117978565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8306/7292/files/song_from_a_secret_garden_violin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5060/5977/files/sidizupeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3500/8405/files/genasoxutafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/lutifo.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_off00006ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 5380 bytes
SHA-256: 0260b04a3f195a508927b2dbd42643a7865f3e8bafeb3301f66496c72399c72e
font_01_sfnt_off00007d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D13 10960 bytes
SHA-256: 74dbf3e2b3ce8c202c49336893bafc41432dd2563e37a4be9353a895a103e3ae

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