Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efd9da9a54c1280…

MALICIOUS

PDF

40.6 KB Created: 2020-10-01 03:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad47157d4a6068631a645c79a86991f6 SHA-1: 617cab61416f989b4b7ead1dbaff333ac93d3b59 SHA-256: 2efd9da9a54c1280f55c0e62d089d47c7edad2577eeac02633c39e29d3b24e4d
124 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ggtraff.ru/strik?keyword=lamiaceae+familyas%25C4%25B1+pdf' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

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 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=lamiaceae+familyas%25C4%25B1+pdf In PDF document text
    • http://files.mountainswim.com.au/uploads/1/3/1/4/131483154/pepawesurogazuzogiv.pdfIn PDF document text
    • http://files.maryjanescott.com/uploads/1/3/2/6/132681783/48d7637.pdfIn PDF document text
    • http://gatuvi.antiquestauranga.co.nz/uploads/1/3/1/4/131437100/7222855.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/kupemigijona.pdfIn PDF document text
    • https://site-1038827.mozfiles.com/files/1038827/38371016328.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/xezijuwekajurenoxoxinemig.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/1ef50aad-14d6-40dd-a180-c3a57dddec82/91820064051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2de0393-a7af-4bc4-80b5-3ae284585f7c/14125472940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38a5c34-12dd-46c7-962f-8bc62b14cc7f/goburituvigimoxavujajot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16f6e3b-e108-4294-b2e7-5afcb4bcdf55/20094181617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/cause_and_effect_worksheets_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/81818394978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/tukiwaxilomexutif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/8965/1621/files/bdo_chenga_tome_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/nozofakefesedisag.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_off00005ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 5280 bytes
SHA-256: ecf870c901fa47230b79e8c46405d7ecc9920b8f5ebcb2001af146465b9504c4
font_01_sfnt_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 11172 bytes
SHA-256: 7541dbf01e2e965963c96cadf58a662205a58908d5251febd7881c0a8ffe9517

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