Malicious PDF — malware analysis report

Static analysis result for SHA-256 951897d442bc5708…

MALICIOUS

PDF

53.1 KB Created: 2020-10-27 13:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8a1aa8deeb66841a0c40e59d3abfce98 SHA-1: 800a5e526c964dba82981c85688a4002ca01df8e SHA-256: 951897d442bc57086a80146ad980a5305ccbd8f4f5e85eedc6c2d15ddaf5c95e
184 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous links to external PDFs hosted on various platforms. One of the primary links, 'https://ttraff.link/123?keyword=understanding+in+a+car+crash+bass+tab', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to lure users to malicious content, likely for phishing or malware distribution.

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.link/123?keyword=understanding+in+a+car+crash+bass+tab In PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/ratabigorofupe.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/3185593.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/6051869.pdfIn PDF document text
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/xubamapopituzem_xuxemikegu_ripenabifuteses_kuvalijorasup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5f966a9dbb72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5f92868c58a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f8d1148e5d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f8fa7e21aee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8a987d0035d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f906edf81b47.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/1/0488/2392/6949/files/54428933940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5364/0608/files/gitodilenes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5880/3100/files/90209988234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e33fcc3-aa30-431c-a89a-f7106c0cd2a9/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aecfcd3f-3ce0-4580-883d-c3a17e6d6f99/apartments_for_rent_new_port_richey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/921f619c-912a-4a9f-8cc6-562143d902db/kawapiwafodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7f2a14-22ac-4324-b78e-88a71d64882b/8335559292.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/fidevemikunuros.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/plugin_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/nergie_fossile_dfinition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D6 5300 bytes
SHA-256: 7dbd249d34f95baf1599535e7912814497b36306d02a4b5d85b5415da130e0fe
font_01_sfnt_off000085c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C8 11300 bytes
SHA-256: 8696afed9c6b0e95a37e547778a6535365d27577193cf13e1439e250b23d81c4
font_02_sfnt_off0000ac45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC45 17584 bytes
SHA-256: 4b6987684cc2ae27908780db51994e089d50b16c477e287fcba2451d3697049f