Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50b0948b57307a9…

MALICIOUS

PDF

56.5 KB Created: 2020-10-28 04:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ee02787a3750283e2e7f19de4265b8d7 SHA-1: 98492a08aea00d1c208461647a9c31a067be2254 SHA-256: f50b0948b57307a96e3e400278efb57ce99228034d484cf22c401defef9c349d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body and embedded links suggest a lure to a divorce-related PDF, which then redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of many external links points to a link farm or SEO abuse tactic.

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.cc/pify?keyword=divorce+busting+book+pdf In PDF document text
    • https://zajubazo.weebly.com/uploads/1/3/4/4/134452036/lanak_pogisuguso_roluridedekez.pdfIn PDF document text
    • https://laxigozi.weebly.com/uploads/1/3/4/3/134361341/dajogado-kitewokotixosaw-sovumoluxul.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/4995129.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/7379816.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/gekokolu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/a9eb11.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/bisopod_bufimumudulorul_xowewukupuk.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7f60432723aa63d.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/2123c.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/kitilivawawetojir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f8e993e0cb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f93a71d63ce8.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/1/0498/1404/4827/files/pojadabuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9692/3040/files/which_of_the_following_is_an_example_of_sexual_coercion_sexual_assault_prevention.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7347/0115/files/51457824763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8177/2445/files/what_is_a_corpus_luteum_cyst.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5092/0855/files/57157901000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2929/7817/files/togatanezawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/present_simple_present_continuous_speaking_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2914/2943/files/android_player_factory_settings_password.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5535/2481/files/land_and_environment_court_act_1979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5386/6919/files/encyclopedia_brown_boy_detective_free.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_off00009ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF0 5344 bytes
SHA-256: 08fb05011f85df97f2970cf8d83f7ef5de0193ae902c3bf7182e56eca1af25a5
font_01_sfnt_off0000b135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB135 10348 bytes
SHA-256: fefdf73c63c8ea815643cf16841afd5bc7bc2bfd9a75343c415f21d1da819b44

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