Malicious PDF — malware analysis report

Static analysis result for SHA-256 316404d19430880a…

MALICIOUS

PDF

46.7 KB Created: 2020-10-14 21:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1622166fd0ba7de86f1e4892f0292727 SHA-1: 2f69bb0cc3d02bf71edad61edc9763098042fe6d SHA-256: 316404d19430880a95e9ccbe0adb56992d7c9f12598eab6df851791fbda21c12
184 Risk Score

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=tweaked+app+store+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f872f66a50aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f873a036a72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f872d382722d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f873fd0463c8.pdfIn PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/domopa.pdfIn PDF document text
    • https://site-1038771.mozfiles.com/files/1038771/16363322587.pdfIn PDF document text
    • https://site-1040135.mozfiles.com/files/1040135/sumomijunorajula.pdfIn PDF document text
    • https://site-1043855.mozfiles.com/files/1043855/35369590557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86fe5bc871b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f8708e0d4d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f872da90e2e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87173ac1263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f873bfda6758.pdfIn PDF document text
    • https://site-1042444.mozfiles.com/files/1042444/98392710173.pdfIn PDF document text
    • https://site-1040182.mozfiles.com/files/1040182/33200604128.pdfIn PDF document text
    • https://site-1038519.mozfiles.com/files/1038519/zekesesob.pdfIn PDF document text
    • https://site-1039320.mozfiles.com/files/1039320/87925819703.pdfIn PDF document text
    • https://site-1043406.mozfiles.com/files/1043406/wuwimexibemukigaza.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/fewefivaxe.pdfIn PDF document text
    • https://site-1038531.mozfiles.com/files/1038531/mosujurupopomavuwigunet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/90468719934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5780/2137/files/vipugibomenidewebexepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0001/7318/files/american_musicological_society_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2070/9798/files/pick_up_impression_slideshare.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_off000078e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 5024 bytes
SHA-256: 743fc825731cee33a60ee1fe0aa2923e6bcd0417f186c11fc94cedcf57ed53e4
font_01_sfnt_off00008a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 10216 bytes
SHA-256: 227619f24449bc8b691a0e80eba3394eb240bb50f0c1a514db2dcbc986006186

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