Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a7ec9ffd2c43e0…

MALICIOUS

PDF

43.5 KB Created: 2020-10-27 05:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 46fbd5a73946df75f7c6afc9183d755e SHA-1: d5b6647065b21b2f5994b3ac29d8fdb68cca4e64 SHA-256: 75a7ec9ffd2c43e03ec21bffaa08c2f3da547632071fef979b56b4079f01ca18
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with SEO link farming and redirection tactics. The primary attack pattern appears to be luring users to malicious sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=maria+kowroski+ballet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_5f94b3923dd33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8c84338578b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f8dbe5cd6600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f88b0ec6f41c.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/kefutus.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/newimedozafa.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/pusonux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f926a611242b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f9521b6e79a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383464/normal_5f95b5247a3a7.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/1/0431/5499/7402/files/come_craccare_netflix_sul_telefono_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9462/0333/files/73063715235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9119/2728/files/factorisation_of_polynomials_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/digital_subtraction_angiography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4702/7366/files/muvebiwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5013/0331/files/tivukinedofazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9961/4110/files/best_tmr_ffbe_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7238/1637/files/delop.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/tedodobubojisulabunime.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/agricultural_economics_rk_lekhi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/mevirika.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/mebelovakito.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_off000069e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 4980 bytes
SHA-256: dead91d3c860e7c87adbef50db0fdad1c5fb39666a0146c4f28d648066fc3f16
font_01_sfnt_off00007b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 11188 bytes
SHA-256: bfab1e5d0ae05ef04684be83ffbbf464ab3f12392085bc8e45294a59d48e7aea

Open this report in the interactive analyzer, or submit your own file for analysis.