Malicious PDF — malware analysis report

Static analysis result for SHA-256 053d54e889b4b22d…

MALICIOUS

PDF

71.4 KB Created: 2020-10-29 11:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05e2e2090c170e9d13478e0ab4ee8553 SHA-1: b9eb2b9963ef27b8d3301ff357f4438b68ddd5bc SHA-256: 053d54e889b4b22d7239bd2fc3fabb22e09109b7398eb752f9b950aab8f06544
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.com/123?keyword=imagery+worksheets+7th+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f958b259dcc9.pdfIn PDF document text
    • https://tinijaxiri.weebly.com/uploads/1/3/4/4/134440903/9850126.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/kalubegimexu_kivojuxutoj_woletefakos_xisomumi.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/4350381.pdfIn PDF document text
    • https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/vilexarimolunobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8b82b257580.pdfIn PDF document text
    • https://refaxezadale.weebly.com/uploads/1/3/4/3/134325555/2969927.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/86a7092679.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/takupudoxuzotanaj.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/7bd6a0ee845fb7.pdfIn PDF document text
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/tegesib.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/fosoritinotizad_dovukabojax_femikoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f8b026426e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f9a652d77288.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/2324205.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/1/0480/0652/9175/files/37217390423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8741/2380/files/kosizapizik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1e1607-e07c-472b-940f-974f54731d7a/12116208367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9244/9717/files/visodosidokowomosojika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1872/9672/files/busobiwejejil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2c2f0c-51a6-4f8f-8d6c-4ddb61beba6c/ziruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b64e93-211b-40a2-bb97-e2c106488fd9/soporte_vital_cardiovascular_avanzado_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3526/8525/files/geekbench_3_apk_for_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC137 6476 bytes
SHA-256: 53eeb9524c3a8011936b0c3835c67dd1eb547cdd28ea0c57ac83f65390a798d2
font_01_sfnt_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 5480 bytes
SHA-256: 1f56751d79bfc44f94cae43b068c3bfc99347900e57ca922c9f5663b0eb1e41a
font_02_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 10592 bytes
SHA-256: d4a37bfd2b7f62c2b574cf4c7763aad591614684b36f1f8d65e74cbb59dee5d6

Open this report in the interactive analyzer, or submit your own file for analysis.