Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05d387ebe9372b2…

MALICIOUS

PDF

52.9 KB Created: 2020-11-02 20:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47ec6e440dd122b5b682c4735d935939 SHA-1: 975d7ea769317c127f62a8da63eae13df8960efe SHA-256: f05d387ebe9372b2a402bc595d5713d6990aa3f4f32a20b811a33d051227e116
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://cctraff.ru/123?keyword=robert+service+high+school+anchorage'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a compromised site, likely for phishing or further malware delivery.

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://cctraff.ru/123?keyword=robert+service+high+school+anchorage
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f97298585990.pdf
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f9a3f97e2db9.pdf
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/ee97eae2f78b1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6234/5384/files/astrology_books_free_download_in_hindi.pdf
    • https://cdn.shopify.com/s/files/1/0483/4780/7907/files/descargar_swiftkey_keyboard_pro_apk.pdf
    • https://uploads.strikinglycdn.com/files/e5328411-0860-4764-a11b-d34e36dd3c5d/99081992346.pdf
    • https://uploads.strikinglycdn.com/files/07f14d22-326c-4201-8d02-5d124a632631/56227988694.pdf
    • https://uploads.strikinglycdn.com/files/5452fa18-047f-4718-a0c0-feb0d27e23b5/6590554218.pdf
    • https://cdn.shopify.com/s/files/1/0504/7189/5220/files/zudukojulopatolefaxinukir.pdf
    • https://s3.amazonaws.com/wunojipu/h_nmr_integration_line.pdf
    • https://cdn.shopify.com/s/files/1/0436/0588/5090/files/rejaruvomub.pdf
    • https://cdn.shopify.com/s/files/1/0440/0775/1838/files/pasos_de_la_misa_del_jueves_santo.pdf
    • https://cdn.shopify.com/s/files/1/0482/2902/3896/files/fomuso.pdf
    • https://s3.amazonaws.com/lewuli/70893801813.pdf
    • https://uploads.strikinglycdn.com/files/c46a1e7d-e522-486a-84cf-31621febbff2/writing_net_ionic_equations_worksheet_answers.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009dff.bin
48e0a3070ad3d2b985ee2695818c3b66eec1b627252202bb3750a7115d519a4e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9DFF 23316 bytes
font_00_sfnt_off000065ef.bin
b1cc266f88a354feb3817397dccd0efb38721ce42c029557c0f83da7808695d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 5268 bytes
font_01_sfnt_off000077e2.bin
0ccbdd742817d048dab913a15197a6db3c14c3ee06128adfd0489d4fc752c2e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 11152 bytes