Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5da3d2c5b649eb6…

MALICIOUS

PDF

37.0 KB Created: 2020-11-03 01:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01513bcae933a1201c3abfd323f63720 SHA-1: 107b85a1172fed94f2a5b39277b9d71e90a664b6 SHA-256: b5da3d2c5b649eb6f60149edf55329fc108490a82e2c56b522ba83c7b9388ebd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign-looking PDF files, but one key URL, https://ggtraff.ru/aws?keyword=google+maps+usa+satellite+view, is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or scam attempt.

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 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.
  • 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://ggtraff.ru/aws?keyword=google+maps+usa+satellite+view
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5f8b664328e9d.pdf
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f90eac1812e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/parallelogram_puzzle_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/3be27768-7485-40ff-bf18-0df9fed41f1f/95447621964.pdf
    • https://s3.amazonaws.com/pofumapetat/foul_shot_poem_analysis.pdf
    • https://uploads.strikinglycdn.com/files/3170d498-9ca6-4f68-932c-fcb7d1e81e6c/23373550853.pdf
    • https://s3.amazonaws.com/jedaxopopuko/wezevobopowofaxuvuda.pdf
    • https://cdn.shopify.com/s/files/1/0496/3808/0668/files/amazon_prime_android_tv_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0507/2565/0592/files/71278896906.pdf
    • https://uploads.strikinglycdn.com/files/22597595-1052-4098-9ba4-668373462c5e/domalimigefil.pdf
    • https://uploads.strikinglycdn.com/files/5a432783-174a-4c59-bad5-f2ccb4f2c605/harry_potter_in_hindi_download.pdf
    • https://uploads.strikinglycdn.com/files/abe44ba7-2fd0-4e0e-bbb4-7618e2ae4cc8/28551658005.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000536d.bin
cc5a210bc97057ca41b23b18497b4a44242972e08a8e0d9b575931d4165679ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x536D 5228 bytes
font_01_sfnt_off0000653d.bin
0717f5ac7705c7e78b2ca9722cf1c503c9af3ff5ec3afe73041053c6ede196cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 10064 bytes