Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7681ebea6549f1…

MALICIOUS

PDF

45.8 KB Created: 2020-10-28 16:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9676e5734cd500f4308e1010ed52e49c SHA-1: 378b046cc23286b12fef54cd74045715d4796c6c SHA-256: 7a7681ebea6549f1d28b148e1d52a1289006be446072ab77d22a8efba277aced
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though obfuscated, contains the URL 'https://gettraff.ru/strik?keyword=last+day+of+june+trophy+guide', suggesting a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly indicates maliciousness.

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://gettraff.ru/strik?keyword=last+day+of+june+trophy+guide In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/wukipotopawomon_lifasi_kutapitu_zubade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f94bef3b8fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f98c1925f1bc.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/8cc7257204aa.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pevatupesa_faxurorelotarom_segemevixuvaxe_sudefigi.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9366951.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/lopinudifegopotukas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/bass_guitar_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/34660344364.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/bauma_2019_exhibitor_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f9f5d7-b695-4184-b619-7462404fc122/32953767204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9053/4307/files/mozofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cc1422-774d-4de0-8af2-c38217c43fed/nebazupizaxalapuwebaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/tipo_de_investigacion_descriptivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/speak_now_4_teacher_s_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e38ed1-686a-4961-94b6-e55f0e7eebbb/konametutosadiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2012/7903/files/delhi_sultanate_period.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/place_value_disks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76e8c89-8102-4cad-8638-de32b25d23ae/78753602623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/73291329895.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_off00007097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7097 5392 bytes
SHA-256: 54441272c4c2d30c9e338a8451ea93aa75b2f7373fe313f62021723fa78bf854
font_01_sfnt_off000082fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FC 11596 bytes
SHA-256: 26bac1dc070b8eade2321397da36542ae5ffd29fdc5d4ddc816f72292003a4d1

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