Malicious PDF — malware analysis report

Static analysis result for SHA-256 be346c2383b0377e…

MALICIOUS

PDF

48.0 KB Created: 2020-10-24 23:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53d3f1f23b9e8a6339929c5eb2446974 SHA-1: 7519f12e1b63896af60129637ee58bd50ed949e1 SHA-256: be346c2383b0377e98684016573c4517272095fba0ef3475120098994c960fdc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to a malicious redirector and other PDFs. The primary malicious URL is https://gettraff.ru/strik?keyword=sat%25C4%25B1lan+mal%25C4%25B1n+maliyeti+tablosu+excel, which likely serves as an initial entry point to further malicious content. The ML classifier also strongly indicated maliciousness.

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://gettraff.ru/strik?keyword=sat%25C4%25B1lan+mal%25C4%25B1n+maliyeti+tablosu+excel
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5f8bfb9104112.pdf
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f91ca3507907.pdf
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f9023b101243.pdf
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5f91b78f83085.pdf
    • https://cdn-cms.f-static.net/uploads/4367656/normal_5f87e889ebada.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f8d90dae949f.pdf
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f9315cc3708b.pdf
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f932833da6b1.pdf
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/1491679.pdf
    • https://ralututoj.weebly.com/uploads/1/3/4/4/134457658/fuzuj.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/8530117.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sugigilim-zivodoza-jubirime.pdf
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/ba12c5763.pdf
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/73b219fb6820e.pdf
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/govodijix_jarelu.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdf
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/1f9b4bef89.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c68ea1f0-06a9-4c1b-b699-4888b56f10aa/jibidumiponuwivo.pdf
    • https://uploads.strikinglycdn.com/files/c4ab4133-3f04-4105-83c2-6c2490245794/todunibitamijetivatu.pdf
    • https://uploads.strikinglycdn.com/files/564a7188-3125-4674-ab21-d8196ab206c5/20938044772.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f5.bin
b71a7b24fc66a962f8ed3dac2d37e9fbdc9e5fddcb0fe39a271405e5e5f99bc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F5 5292 bytes
font_01_sfnt_off000088fa.bin
b922899f0a2a248d0eb48530a327925665b723a59a83fb5e167459899a43bb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88FA 12748 bytes

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