Malicious PDF — malware analysis report

Static analysis result for SHA-256 1919f16789e034d9…

MALICIOUS

PDF

41.7 KB Created: 2020-10-06 08:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a9e8905d47b98a4aaeaff024d991808 SHA-1: e8bc87c35ea5f178b7cfa3ce566de1ab8197e7aa SHA-256: 1919f16789e034d91d3f48a9aa60c15c0c8b74a379be57d335cdd4e89a552c0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains a URL that appears to be the same malicious redirector. The PDF also contains a large number of external links, many of which point to other PDFs hosted on 'strikinglycdn.com' and various other domains, suggesting a link farm or redirection scheme designed to obscure the ultimate destination.

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://ggtraff.ru/strik?keyword=instant+pot+fresh+ham In PDF document text
    • http://files.cafedatalkalamode.com/uploads/1/3/1/4/131483550/3bbbf7.pdfIn PDF document text
    • http://tewinif.marblefallslibrarythrift.com/uploads/1/3/2/7/132712127/8323090.pdfIn PDF document text
    • http://wusobisix.feminingrace.com/uploads/1/3/0/8/130874197/juzegogokafepomer.pdfIn PDF document text
    • http://tuzop.haexperts.com/uploads/1/3/0/7/130775565/9ba8ca1718dd.pdfIn PDF document text
    • http://files.hammellwinealliance.com/uploads/1/3/2/6/132695575/d00818ffd3e.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/f38b8a22-8cfc-48a2-b1a0-295cebc0d6e1/babulob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85361a2-5992-450f-9fd9-20bed7286f37/dafukopujajofusoxuwemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dfa0a0-ffd3-4067-bfdd-6d29ac0316fa/fofesomudirukodileli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cc1c35-2fd4-4abd-900a-90c72a8e9551/neserababuros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b882a32-3297-424c-ada4-1007fe3ee3ce/wesabagiluxowulatit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c89c055a-4501-487d-b5bc-3369559feaea/venedinezunugupixexaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065b42a5-5631-405b-9b72-bb30d973598a/1649478423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b524fa5c-34be-46e4-94c7-b40587b0f35c/bupotonagipifomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ee13cb-0971-4c3f-a59f-b52da32197ea/15711102974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3996e9f-9d44-450c-ae10-09f55e24939c/wadezepezagomibetebat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd49ba99-499a-4a9f-9001-29686aff6791/jepudotezenaxowire.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_off000064e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E8 5044 bytes
SHA-256: e1b99c9c56d1b9f77e49e339c5a349c043dcd3fd354433fb3029ca9c368fc7c9
font_01_sfnt_off000075e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E9 10700 bytes
SHA-256: f17484fa7544195344dd0189ec87e67b206dc71f7730088ea13cfe8208d9a42e

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