Malicious PDF — malware analysis report

Static analysis result for SHA-256 3192d4c93b7f00cd…

MALICIOUS

PDF

48.1 KB Created: 2020-10-11 06:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4f32726169c358d652fb44bf368b6a08 SHA-1: fc3d4f292a58c2748f5f4076caada028839a4b36 SHA-256: 3192d4c93b7f00cd50e77d18a93d4f900ce4644d2fa1e944b02fd312f13c8ef9
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'salmon skin treats for dogs' and a URL that appears to be part of a link farm hosted on disposable domains. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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 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.club/pify?keyword=salmon+skin+treats+for+dogs In PDF document text
    • http://fafiju.helaventures.com/uploads/1/3/2/7/132741024/varomakaf-tadonalusulap-luragetatewep-mabuf.pdfIn PDF document text
    • http://files.montalvofoodwine.com/uploads/1/3/0/7/130776246/5894835.pdfIn PDF document text
    • http://files.razorpedia.com/uploads/1/3/0/8/130874329/butebefovanaka_gusanuvemiku.pdfIn PDF document text
    • http://files.cloudvalleycashmere.com/uploads/1/3/2/6/132681296/e45951.pdfIn PDF document text
    • https://site-1040251.mozfiles.com/files/1040251/pujetupuxidimuxezarirav.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/gijomegesi.pdfIn PDF document text
    • https://site-1038326.mozfiles.com/files/1038326/7769263852.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/30975269905.pdfIn PDF document text
    • https://site-1038863.mozfiles.com/files/1038863/jakexamupa.pdfIn PDF document text
    • https://site-1043037.mozfiles.com/files/1043037/73150541432.pdfIn PDF document text
    • https://site-1037824.mozfiles.com/files/1037824/7989854492.pdfIn PDF document text
    • https://site-1039444.mozfiles.com/files/1039444/binikixuraru.pdfIn PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/lovowerotakobuzevone.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/a92a87be-8ed7-4f71-8487-8b515a6c2db7/42905978530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6ca375-3667-459b-ba4c-73ab66071d2d/68184175847.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_off00007973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 5392 bytes
SHA-256: 76a085de48de6ef813e263a08938e57e44885cb65eb7147fb2160e83fddfd609
font_01_sfnt_off00008bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAB 12380 bytes
SHA-256: 219b121759be5392d21058fe56ca4ece52691adfcdb9cffe829296a045992d53

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