Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d198fa6f908fa8…

MALICIOUS

PDF

44.6 KB Created: 2020-09-30 16:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ae298bd0dd73e7a6a627a64280cf8eec SHA-1: f7e96631a51aac57cd1e2f42d35995f86c049759 SHA-256: d3d198fa6f908fa8d7c60013c677e85129898d5617ba81f438df6ad1d67067dc
124 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, specifically 'ggtraff.ru'. The document body, though partially corrupted, includes the target URL, suggesting a lure to download or access malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous disposable domains hosting similar PDF files indicates a link farm used for SEO poisoning or traffic redirection.

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 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=guia+ceneval+medicina+contestada+pdf+gratis In PDF document text
    • http://dobagixut.aldersongintegrativehealing.com/uploads/1/3/0/7/130775584/1864624.pdfIn PDF document text
    • http://files.andreamalinskymason.com/uploads/1/3/1/4/131454102/b2211e3.pdfIn PDF document text
    • http://files.simixlaundry.com/uploads/1/3/0/9/130969768/628b51b.pdfIn PDF document text
    • http://files.usmanoladeinde.com/uploads/1/3/1/4/131453919/virixamo.pdfIn PDF document text
    • http://files.losangeles-injurylawyers.com/uploads/1/3/0/9/130968913/310323424fb48f3.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/zikakigupaleperovepusum.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/958254329.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/9921550580.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/2035236594.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/penagevibenakupoge.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/sobure.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/paseforugupa.pdfIn PDF document text
    • https://site-1036621.mozfiles.com/files/1036621/bazatukosipip.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/gazozuxususevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0ecd80-fefb-4a6b-8451-f14e4a33600c/1631810188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fe846f-adbb-4684-9da7-9cbcbcab9222/61505433833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f63502-f080-4a00-9e5e-45eb37a9b8d7/17473098615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0402d0e8-a360-495e-834f-eed67a09535a/41332051635.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_off00006ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC8 5564 bytes
SHA-256: 9ccc5204af997458fee1a822f5a46a14fde0af9ff926654f1c37e2d7be1c8034
font_01_sfnt_off00007daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 12192 bytes
SHA-256: 925ebe8c3143d160837954f9fe6e29ba4dfb8bd311b47c573e43387defce39b4

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