Malicious PDF — malware analysis report

Static analysis result for SHA-256 749ef6be1f88f386…

MALICIOUS

PDF

43.1 KB Created: 2020-10-07 22:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a644c07f28cb92a4705f8f9c44d7c81c SHA-1: d63d18195fc90f355847eee2df9c060faa52bc21 SHA-256: 749ef6be1f88f386df746ef3c2f43cc723ab37abde59bc947baa561aff7d4b46
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, designed to lead users to other PDFs or potentially malicious content. One of the embedded URLs, 'https://ttraff.link/pify?keyword=david+clayton-thomas+songs', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

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=david+clayton-thomas+songs In PDF document text
    • https://site-1038943.mozfiles.com/files/1038943/sojemexesozasonixijete.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/72746246334.pdfIn PDF document text
    • https://site-1040669.mozfiles.com/files/1040669/faluxebitir.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/sevukofunatajaxiruvuzu.pdfIn PDF document text
    • http://files.solidarityflag.com/uploads/1/3/2/7/132740804/rimebakis.pdfIn PDF document text
    • http://nomozuno.gbgoats.com/uploads/1/3/1/4/131437100/noperafigixase.pdfIn PDF document text
    • http://files.utahrealpropertylaw.com/uploads/1/3/2/6/132682235/tejuxugulozituzo.pdfIn PDF document text
    • http://folod.mudi-canada.ca/uploads/1/3/1/4/131407537/ad2d1b38aad16bc.pdfIn PDF document text
    • http://files.thepottershousesandiego.com/uploads/1/3/1/6/131637477/8779920.pdfIn PDF document text
    • http://bimige.kathyschachel.com/uploads/1/3/2/8/132814170/suwepoje-modomu.pdfIn PDF document text
    • http://jufiki.jessehazel.com/uploads/1/3/2/6/132681692/vevuvezegenuw-wasafuz-bigavig.pdfIn PDF document text
    • http://tejur.sghock.com/uploads/1/3/2/3/132302868/3436268.pdfIn PDF document text
    • http://files.musicianspathtofi.com/uploads/1/3/1/6/131606453/2cf15482.pdfIn PDF document text
    • http://files.dannytropicals.com/uploads/1/3/2/7/132712593/735138.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/f13c2fc9-3786-4098-888d-6912c732e7e4/zuwanobupatudadewuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f084ef88-b899-4795-8db0-3e6dfac5f9c0/jupetogodom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6972e1c8-dbf7-402c-9733-772ae7eb4675/lexenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfe4a6b-6796-4ebc-9cbd-5dd0017abe85/84924469536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad87743-a11d-4eae-8be4-1f23ac10c07b/48283844828.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_off00006a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A54 5448 bytes
SHA-256: 92f6fff634e05e4f9470e5bd53000e841cf5b741fe304c71aed5b9688d0fb520
font_01_sfnt_off00007cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD7 10196 bytes
SHA-256: 3bd417a52c711f292ee96be60431b49704b3e337b6285e0f39b1df9b76ad03fe