Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bb1e9939af14f2…

MALICIOUS

PDF

32.6 KB Created: 2020-10-31 09:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6d355673980d2998ddb9892b58dae881 SHA-1: 928a19e959f43cf6d9eddc81800309c0ecafe098 SHA-256: d8bb1e9939af14f211b4ac026cec6492fc61bfdbeb55f4d2c3d51147b2eac09b
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.ru/123?keyword=a+broken+heart+and+a+contrite+spirit+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8cb81dbc9e8.pdfIn PDF document text
    • https://didipovewefof.weebly.com/uploads/1/3/4/3/134306756/mipag_pixodejadiza_lisopul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/wasedujexufebupaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/les_panafricanistes.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/vobinebatumivakado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3488/5275/files/hbo_mommy_dead_and_dearest_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ccc354-ea8f-495a-9c46-3282da1f5313/70870040440.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/20187855749.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/sat_chemistry_answer_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4ce9b2-025a-4b28-9036-4228b0ed03c8/91403149113.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/95049348537.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_off0000420f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x420F 5456 bytes
SHA-256: 1a5de14aa822c6528c8e08a2cb9a7a11be97467c2d5a4e8475b617a020d7b028
font_01_sfnt_off0000549a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549A 9632 bytes
SHA-256: 1ff09828c3f132655e68905466fa8953cd48a27c9d0e84c838a4ba5af7996c48

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