Malicious PDF — malware analysis report

Static analysis result for SHA-256 280f69b8769f2d7e…

MALICIOUS

PDF

42.5 KB Created: 2020-10-15 12:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 48083235db606b5ffd532d32f0936caa SHA-1: e370a4d7de7e3ec3e1e51ffec55c8cc07a95244c SHA-256: 280f69b8769f2d7e6e693f33078e3611cabce14dcc04a548854b9e5a1b6bd031
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding a large number of URLs that lead to potentially malicious redirectors and other documents. The primary malicious URL identified is 'https://ggtraff.ru/123?keyword=replenishing+the+earth+wangari+maathai+pdf', which is flagged as a known malicious redirector. The document's structure and the high number of outbound links suggest an attempt to direct users to harmful content, likely for SEO poisoning or to distribute further malware.

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/123?keyword=replenishing+the+earth+wangari+maathai+pdf In PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/45293363546.pdfIn PDF document text
    • https://site-1043307.mozfiles.com/files/1043307/5854385826.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/97397392754.pdfIn PDF document text
    • https://site-1048209.mozfiles.com/files/1048209/kulinowagatimikonunivima.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/pidatugudedubipeku.pdfIn PDF document text
    • https://site-1042629.mozfiles.com/files/1042629/shortcut_to_size_bodybuilding.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/52698802038.pdfIn PDF document text
    • https://site-1042679.mozfiles.com/files/1042679/dadilipoxuxafaderuwonosem.pdfIn PDF document text
    • https://site-1041845.mozfiles.com/files/1041845/depoxezukizavejo.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/d73b6a65c079055.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/gurelutujerun.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/6b78c9.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/8486151.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/6407067.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/c558058877e76a9.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/395d8344-ed83-4f04-8841-2740cd73dce8/6182018394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a55c5d65-47be-4dcc-b12a-15cbb5376f09/monomubitogodixerep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04dc6bfc-3df1-4593-826c-5244dca7ccac/jekiseruxitaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71718f38-5570-4282-b9f5-5971abfeb4b1/birifuwibevidewemanaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4247/8501/files/dimefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6839/files/zexisija.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_off0000668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668F 5552 bytes
SHA-256: 2a1b457ce1ff88273d3a4e74e8eea4053d4c7df18223b13e1f8e8823f3db1603
font_01_sfnt_off0000795a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795A 10352 bytes
SHA-256: 8b5a4a07ae69d3d1434c506a38bf4c4891f0155033f3f26a50bca856a5124fb3