Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7389e51f96e2ce…

MALICIOUS

PDF

48.0 KB Created: 2020-10-28 17:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 449f1cd7ccb490dd1e14a1d5f6ea34bf SHA-1: 2357bfb26010c5d1db793998179017576800dac1 SHA-256: df7389e51f96e2cea74971576b9cb6880f9b3960d4045371f333a5470843c786
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary redirector URL, https://ggtraff.ru/strik?keyword=himalayas+mountains+map+location, is flagged as malicious. This indicates the document is likely part of a link farm or SEO manipulation scheme designed to lead users to malicious content, potentially for phishing or malware distribution.

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://ggtraff.ru/strik?keyword=himalayas+mountains+map+location In PDF document text
    • https://davobudo.weebly.com/uploads/1/3/4/4/134432622/4344157.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/tovose.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/5468437.pdfIn PDF document text
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/760607844.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/xusawozilu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/45372161250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e14522f-1d10-4fa1-a3ce-22e9fc5ff728/post_baccalaureate_premedical_program_guaranteed_admissions.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/walerato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/furov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae0ba35-c986-4d3d-b50b-e62f81694f3f/74956773325.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/hdfc_mutual_fund_sip_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/33995791792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39a5616-6c86-4352-881d-73325471b7ec/43848287763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0308/4451/files/quikrete_pool_filter_sand_aquarium.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/nufuvezefezapupujupaweza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/vewifaxolazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f3ead4-330a-49ff-b7fe-3ca5bcd89a50/50748727757.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/nakobigipisixapozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12e317e-f376-4050-abc2-9bcc462e4f82/nabokotogiziramijaju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 4808 bytes
SHA-256: c4036e0edb12f6d23559986cc5b0918099fef1ca32ea8a13f53c841d244b948b
font_01_sfnt_off000080fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FE 10344 bytes
SHA-256: d4e529dea990b12150a216b68a97cf12a3c98ef9ed312a4fdbefcebcb9ec4197
font_02_sfnt_off0000a44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA44D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361