Malicious PDF — malware analysis report

Static analysis result for SHA-256 55af15841a9ebdcf…

MALICIOUS

PDF

45.9 KB Created: 2020-10-20 12:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 59a82deb084c00db6ce7f4f73e98a9ae SHA-1: 19bee7d52ab8e6d85ec3e664fb2d6786655ec649 SHA-256: 55af15841a9ebdcff0eacdf1bb76123a5a11fe0d5a8fc8a8aeb1298d2019ad6d
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation scheme. One prominent link, 'https://ttraff.link/pify?keyword=reported+speech+rules+pdf', redirects to a PDF hosted on Weebly, which is part of a larger collection of similar links found within the document. This indicates a likely attempt to drive traffic or distribute content through a network of linked PDFs.

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/pify?keyword=reported+speech+rules+pdf In PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/baziv-posizujog-guxed.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/lovilunufutunikane.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/4109476.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/zulazanemegefu-gepofinasux-xuwipaj-bigojumemerowo.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3532345.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/sepulizebiz.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/femigi_tavug_jalenon_fijadafim.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/d296180d624e27.pdfIn PDF document text
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/zizowogezil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8bef60a278d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f88f3c94b178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8762e8d349d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5f8c64edaaf0d.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/97b80882-447c-4ee4-bcce-965d3078ff03/sikabaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0912bee7-dfc9-4e89-a74e-82dfafe729e7/desedofujuxazaxusivoziwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe725621-85bf-4c86-92dc-59ad9d7ee6ce/delawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75d6a2b-cb61-4e12-872a-4ce8f0e8879b/95147778901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf1e620-5454-4ac2-a6d6-ff5ef374b151/religion_y_dioses_de_los_purepechas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d1cf7d-4bf4-4cbf-bfdb-02b48a3287b1/46517530055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61a0321-063a-4527-94e5-110359d9d9bb/97802341731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b570262-e761-483a-8cdf-2da0b97a527d/56402979941.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_off00007648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 5040 bytes
SHA-256: 4c094fa22fdc92411dbb49e5151e070f1a27b7d5a2444ed75ca176cedbee2cbd
font_01_sfnt_off00008772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8772 10232 bytes
SHA-256: e0cb9c15dec4a39560ce2e3346b4a2a753d53e4562cec80e4cc1da663ed1be2f