Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f91fd59a8ead2a0…

MALICIOUS

PDF

47.4 KB Created: 2020-10-26 18:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fb0f51a18fd86c3dda14ac890826883a SHA-1: 3575bbb45861a5183303e9f976088ae73b63ad95 SHA-256: 6f91fd59a8ead2a0812db2bb454b43bbfd97887bf942b13a2a1044f5cd89026c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document functions as a link farm, embedding numerous URLs that redirect to potentially malicious content. The primary redirector URL identified is `https://ttraff.me/123?keyword=skyrim+sanguinare+vampiris+heilen`. The document's structure and the nature of the embedded links suggest an attempt to lure users to external sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/123?keyword=skyrim+sanguinare+vampiris+heilen In PDF document text
    • https://xufolonul.weebly.com/uploads/1/3/2/6/132695880/0c01f0d.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/b855e5cb3a.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/e30a25.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/fejesugotu.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/d6682a18ee.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/4290479.pdfIn PDF document text
    • https://vudepupebowazuk.weebly.com/uploads/1/3/4/4/134472779/16fd817.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/202d5.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/862a1.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/zijapimup_numexin_musukameruk_mexasog.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/4c302cc0-1216-49b5-b656-7dfef0528857/teroti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1bb9362-59fe-4c94-9899-1b2a3792e62d/zedopolevebuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa68012-ae2c-4c31-ba2d-8c668d9beabc/crazy_craft_mcpe_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/5825660338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/react-native_android_unfortunately_app_has_stopped.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2417/7093/files/53258846767.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/manedirojigi.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/98966780453.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_off000079ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79ED 5560 bytes
SHA-256: a526f5d95f475d2563e7b1a3434153a83b5558a51b89b5bda2f63a4abc8be5b6
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 10388 bytes
SHA-256: 5fd554bb60a84d44310da0f3b532d530412bcf2d010f83cd683ccc0ddc5f8778

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