Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85db7250bd5f40a…

MALICIOUS

PDF

55.5 KB Created: 2020-10-26 10:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 27576bec1bf84a45f944956882f55a8f SHA-1: 90586d168b37533e350e892f8df7928d3f4235ea SHA-256: e85db7250bd5f40a7ec5d25fc9dac567a95eeb27dc7f2e073a7db6c56a6ab19d
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file 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 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.link/123?keyword=program+type+already+present+android.support.v4.app.backstackrecord%2524op In PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/6738325.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/bezadiwufase-daladus.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/3c0d22f9ea77.pdfIn PDF document text
    • https://jalekusurasi.weebly.com/uploads/1/3/4/3/134392531/7214747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f90dacb6510c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5f93c5ac967d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f944f75221b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379974/normal_5f8ddc4f5375d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0932416a-0d39-48f5-bdcd-95fbff223ade/20511523918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d336608d-93c7-49a6-9f7a-9ced71247730/1966724915.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/luzafofiwudi.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/microsoft_sql_server_management_studio_2008_r2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/lepujekuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/81539500489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1262/8895/files/dufuwarofawubabugowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3281/1957/files/procedural_control_of_delegated_legislation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/manual_intuitext_clasa_3_limba_romana_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/99163180625.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/diaphragm_breathing_exercise.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/dojezenetifinurudejiwawe.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/c_open_in_new_browser_window.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_off00007177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7177 9448 bytes
SHA-256: 94200d373ea1b09523c9e51af7dc09da0b0e93ac19702c8569811d5305a64d35
font_01_sfnt_off000090cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 6120 bytes
SHA-256: cbf903c82895d993264a02826febd1a5f80252b033f3f0155b33008a1d3dfd47
font_02_sfnt_off0000a597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA597 12868 bytes
SHA-256: 07878272138fd9965e56cb8bc865a3edcd169d7002a559e7d6331cfab777b645

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