Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b552c3950e420f0…

MALICIOUS

PDF

44.7 KB Created: 2020-10-27 18:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: df830ecc10160b58d902006937b24cb9 SHA-1: 90f2e3dfeeebea8d0247a9b8579c0a4c59aff5ba SHA-256: 8b552c3950e420f01389bae3e3795db11ec39b3cd7f05f6d95eaab5df0ea9c30
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.link/123?keyword=mhfu+pokke+farm+cave In PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/45e1bdd5a75996.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/4054812.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/xemelitasix.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/bofejivazibap_dubebix.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/646a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f8d897cc0e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f8971b370d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f89528467956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f8e8081d6eef.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/1/0440/3943/8501/files/52443138781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0298/9208/files/lulubox_apk_download_free_fire_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3357/5075/files/30429022797.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/estilos_de_aprendizaje_kinestesico_visual_auditivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/24851868404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6602/9743/files/58224605906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4239/2232/files/monster_high_game_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98895326-0c07-4569-b228-9beb16da4c1a/tulixanusutipakuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf84c3b4-36d8-4792-9fb0-8f17f08b9856/71682443944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e16e61-23ef-4400-93ff-32faf4b13ea8/86877323166.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_off00007000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7000 5172 bytes
SHA-256: 65ece499d89c8fd0ef099082549e75d4271d3914045ba313855126857a6ca1f4
font_01_sfnt_off0000818c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818C 10716 bytes
SHA-256: 0682a3162eacf7d1569513e90012677de6ca31da5ce9b4782b743eac6d326e36

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