Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be880919d4fd0c3…

MALICIOUS

PDF

51.6 KB Created: 2020-10-19 23:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc30a6a93b39f39201044f430c469fc6 SHA-1: 89427fa8980bd99fb02819e411e7d3e4d2aa43d3 SHA-256: 2be880919d4fd0c3bf42390819bb8f5f98b26398a85fc13a14b7fb57bee66028
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links pointing to external PDF documents hosted on various disposable domains. One of the embedded URLs, 'https://gettraff.ru/wb?keyword=equilibrada%20calculadora%20de%20ecuacione', is flagged as a known malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme, likely designed to either distribute malware or phish users by redirecting them through malicious infrastructure.

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/wb?keyword=equilibrada%20calculadora%20de%20ecuacione In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/ganaxobi-domibipadi-rededabaje.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/7840288.pdfIn PDF document text
    • https://karezolakep.weebly.com/uploads/1/3/1/3/131398125/5768239.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f8ab5c9356c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f89a2a7ab5a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8739a6d5e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8c4886ee99f.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/2342158.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/pulesu-dofepaxok-nisemovez.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/zolejotuluton.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/7673596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f88821324aca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f874e2b4dfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8705f3057b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f872bd4d748e.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/6fc94af5b7a.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zavegikopereki_buwotu.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/resavipibidote.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/movav.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/1/0432/6627/7534/files/completing_the_square_worksheet_math_154b_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/little_bear_coffee_instagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/go_launcher_z_old_version_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1076/7017/files/somogowebezolatoratilezer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 4976 bytes
SHA-256: 96d0160fb1a8eb1382a09973db4e811bb6605dbea689aa1bea8e6c3cab4b5981
font_01_sfnt_off00007971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7971 15316 bytes
SHA-256: 95dfcc65923a2abf3a76195a4510f77ffa03be75405d4c79dca90ca9803dcb4e
font_02_sfnt_off0000a96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA96B 16080 bytes
SHA-256: ae4c1039909c6b18400a693790947520403f0a9c3cdc5bdc37254682f4165006

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