Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fd36459f5b52d6…

MALICIOUS

PDF

49.2 KB Created: 2020-10-28 21:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ef11ac0f993798e35d7651f7dcf7c4c SHA-1: 7e89b548232d0c1e4ad13fcbeee880e8e4c77a0f SHA-256: 01fd36459f5b52d6a810a92cfba6416df4c523983d118adb0c54f0f1bf1e1dfb
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The embedded URL, https://ttraff.ru/123?keyword=casablanca+hotel+san+juan+reviews, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the nature of PDF redirects often involves JavaScript execution to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/123?keyword=casablanca+hotel+san+juan+reviews
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5f92dfc253cfe.pdf
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/efc9255.pdf
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f990be585c64.pdf
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f88511b76b67.pdf
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/1376720.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5f8f491091c39.pdf
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f9917853eca7.pdf
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/64d3b7d32d8a1e0.pdf
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5f97260b9728d.pdf
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f97709ca669e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/petikamov/best_history_book_in_hindi_download.pdf
    • https://s3.amazonaws.com/henghuili-files/english_test_present_simple.pdf
    • https://s3.amazonaws.com/tutapaxi/41636930540.pdf
    • https://s3.amazonaws.com/xanebavifamopez/netizens_in_cyberspace_active_citizenship.pdf
    • https://uploads.strikinglycdn.com/files/79714987-9a4e-47dd-888b-f8df2205fec1/past_simple_and_past_continuous_acti.pdf
    • https://s3.amazonaws.com/mijedusovineti/word_to_adding_blank_page.pdf
    • https://uploads.strikinglycdn.com/files/5228d583-d156-4a98-aa9d-9ee111e82ae8/xeduwilisasoz.pdf
    • https://uploads.strikinglycdn.com/files/8da1f821-e06d-4268-b74a-b3e37f0dd0e9/65453044877.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_off00008211.bin
5307355cbe84315ba364dafc83acde0ddc5e6a70f912d3c5df0990dcc08fc873
pdf-font-stream PDF embedded font (sfnt) at offset 0x8211 5160 bytes
font_01_sfnt_off000093a7.bin
5b1e7590df8e5ad5f852fbd18ca36f15b9eed182d8a654df4243e1d5e248fc72
pdf-font-stream PDF embedded font (sfnt) at offset 0x93A7 10656 bytes