Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b19c993c0d23f46…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 03:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 50896e3e67265998f1646b120bbe0a10 SHA-1: 705b92585e3b22d27180f36b04b1b50e3a2e8170 SHA-256: 6b19c993c0d23f46147395bc2005b6c71db99aabc5e6d7cedf83d906ced8d305
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and a known malicious redirector. The primary URL, https://cctraff.ru/strik?keyword=oracle+certified+java+associate+syllabus+pdf, is flagged as malicious. The document's structure suggests it is designed to lure users into clicking these links, potentially leading to further malicious content or exploitation.

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://cctraff.ru/strik?keyword=oracle+certified+java+associate+syllabus+pdf In PDF document text
    • https://site-1036869.mozfiles.com/files/1036869/52780515645.pdfIn PDF document text
    • https://site-1038440.mozfiles.com/files/1038440/befuxetujewelitafiset.pdfIn PDF document text
    • https://site-1038675.mozfiles.com/files/1038675/52492125115.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/2d537b7a.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/nipomomuka_gisotufeje.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/ronufebe-fazabewoxifuli-mitosi-sobonatifa.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/22c1e412c2ef06.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/fa45cf1873c.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/8c2f9c9d-3f82-4b7b-95a0-77c07812418a/35642991734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d7a36c-daaa-446d-9db5-27899bc92ac7/99373892647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc04c89d-983e-4a22-abd8-1fb4232e58d7/38778880782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412e2185-3ead-4565-bb8e-1e778e0b352e/taruxosipoxuwesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8551ab-63d9-4166-9d98-804ea0b7490a/65941566752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6648/5657/files/61759215713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4660/8282/files/33278613609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8893/1741/files/li_thi_van_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/37825415299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3035/files/96641896970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a47dcc-8e93-4767-beeb-1ab5cb31c9b5/2022695553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ae67d4-728e-43e6-ac65-c94923ba67b1/49376102636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fdf612-6663-446e-b27f-6095caa5756a/wimamokemibobapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fb97d36-423d-4670-995a-46f0e11ea79b/nogovureduganefatuli.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_off00006f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 5556 bytes
SHA-256: d417770d12df4fcb3a5df5d7bd6bd40d3a33488a8e915a7939633c7fdd9338f9
font_01_sfnt_off0000822f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x822F 10340 bytes
SHA-256: 3c48604d54b291a20586d0953ed20a9888eaaf827e3343d5b02ac8b346d1cc4c

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