Malicious PDF — malware analysis report

Static analysis result for SHA-256 791c468ad1c1c82e…

MALICIOUS

PDF

81.2 KB Created: 2020-10-30 00:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4eccf5c84402ce73ad54a092fd676c52 SHA-1: 1e61cf28c47d3ce4f361b9de67c09f4414a633b6 SHA-256: 791c468ad1c1c82e8203a1798febc852133fe6d5f576f98771dce6438bed097d
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, disguised as a search result for a technical document. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/123?keyword=seismic+design+of+building+structures+lindeburg+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/tadibenevipexujirobovajeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/ion_demi_permanent_hair_color_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/sobisuxobapiwonamiwop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2747/4843/files/otex_express_ear_drops_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1403/7919/files/drift_games_unblocked_99.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8781/5345/files/free_fire_game_download_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/exceptional_learners_12th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/best_open_source_reader_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3821/4810/files/59997512952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1527/2605/files/gizebesamijogez.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/que_es_el_catabolismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0707/2185/files/newobobosawajubida.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/argumentao_e_retrica.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ginidupesiwodal.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_off0000f3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 5388 bytes
SHA-256: 8a26f6b4031e6e2bee63a46c60e97cb658c349f0169768f25446af9a74e16405
font_01_sfnt_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 10712 bytes
SHA-256: 2bb948adea3dfba6fc2763a3fea2e189af9bb50baa1633c9030c8612c48edd90
font_02_sfnt_off00012929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12929 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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