Malicious PDF — malware analysis report

Static analysis result for SHA-256 435412f70b35d871…

MALICIOUS

PDF

43.8 KB Created: 2020-10-05 00:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a90868b8ceae2e1aa109330d8d494409 SHA-1: 8d0bc2c66282fde7be7bd96f0f43991485ffa8b3 SHA-256: 435412f70b35d8713fabf1f1f118943d5395ebeb20d7b6ead921f191a7aaa7c4
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://ttraff.club/pify?keyword=wii+drum+set+parts In PDF document text
    • http://ganofaw.rccghopmd.org/uploads/1/3/2/7/132710797/d28cb887d2.pdfIn PDF document text
    • http://xawamet.philadelphialogisticscenter.com/uploads/1/3/1/4/131453036/69ef8b8a4.pdfIn PDF document text
    • http://files.lahlitah.com/uploads/1/3/1/1/131163747/905e083440.pdfIn PDF document text
    • http://tewexob.stuartcrouch.net/uploads/1/3/0/7/130775451/xupukilivuj_sidarepusofigi.pdfIn PDF document text
    • http://files.sequimcars.com/uploads/1/3/0/8/130874376/4756545.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/554163897.pdfIn PDF document text
    • https://site-1037101.mozfiles.com/files/1037101/vamujada.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/nuvaxemogudowokoviwexi.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/kokirowegiturulotuk.pdfIn PDF document text
    • https://site-1040442.mozfiles.com/files/1040442/56447526122.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/1/0484/3320/1306/files/tc_electronic_flashback_x4_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9274/5634/files/naclo__h2o.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/13_colonies_study_guide_8th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1273/4107/files/toastmasters_table_topics_competition_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4453/4429/files/the_enduring_vision_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3826/2684/files/young_justice_superboy_voice_actor.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_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 5088 bytes
SHA-256: 4b2dfe05af84e2fc3d1173ed239a2cd24738f23452c8756d9670b158e3c0b088
font_01_sfnt_off00007ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 10388 bytes
SHA-256: fef364770cbd7c870baf49f63e48141674c57398557513f1bb31a53716618bed

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