Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9c5075b46d34d9…

MALICIOUS

PDF

38.6 KB Created: 2020-10-27 22:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c4b56f37c671aa0bb446dc45348c75f0 SHA-1: 1917a2101da0a2620fe63eabdd239f9fd89d85f9 SHA-256: eb9c5075b46d34d952cbafda38924d59c0d2b03c41dcfe7c7395448e11f8c54e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to disposable hosting or redirectors, indicating a link farm designed to drive traffic to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?keyword=personal+guarantee+template+nz'. The ML classifier also strongly flagged this PDF as malicious.

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/strik?keyword=personal+guarantee+template+nz In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/71e9878.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/1895c8d81e.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/ralid-nipisew-wuxexedoz.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/fitureji_benonudurivel_vunodekuvos_xapilirav.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/jovaregirewegab.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/836834.pdfIn PDF document text
    • https://xodetawutal.weebly.com/uploads/1/3/0/7/130774968/36530430.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/6031198.pdfIn PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/nasesa_zisenivutukage.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/38910517-f752-4bc4-a814-8b56f049cd42/dodusitafawuvamufado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0abd52-f712-411d-80ca-b11a55bcd781/xigilerotaxevifivozatofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16910aae-5e05-4b92-ab36-496f8ae4f029/58045559891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/usb_camera_apk_old_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9500bd8-77b1-49b3-baff-d2d820963c3c/eve_anna_carey_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba2f86f-93a7-4c74-8752-84df700fc269/22605085899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce079d3-8660-4436-a62b-bf81fac1fcf3/40995289433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06536688-af2e-45c3-89a0-372655336f54/64921132377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad12df9-1dcd-4f89-8f60-2d7078a42b2a/vanovataxozor.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_off0000595e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595E 5192 bytes
SHA-256: 88418c0618998240b3b3d21867668af4ed5faa884539f29a68fd0d8f98f7e4b3
font_01_sfnt_off00006af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 9976 bytes
SHA-256: b0769bcd573bbd07151254f44a53a4fb216425a3cb5f767478058ccb48b67029