Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23183e714fbada6…

MALICIOUS

PDF

42.6 KB Created: 2020-10-22 22:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ecc8f56ca1a97f5ea263805382acede8 SHA-1: 3d525bd2070555f7201baf19e69fd9b8772cc210 SHA-256: b23183e714fbada6606ca2979e3fa16dc661796db7745f4ac8baf474fdcd77c9
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'ttraff.me', indicating a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains the target URL, suggesting it's part of the lure. The ML classifier strongly flagged this PDF as malicious.

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://ttraff.me/123?keyword=ciclo+biologico+de+onchocerca+volvulus+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f8990055d89d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870cf5197d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8b3a4859ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5f8fb0874efd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5f8e407d3a7b2.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/30bf6e52-2a4d-47f4-bd05-c4bc45770201/34971957986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758e5d78-aa46-478b-ac58-34e6f67279e9/89445892581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ff3094-e181-4ba5-a313-14c041baa85d/22522995197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9d271b-e60e-4b79-8546-25b732534e66/59371255502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/488c9984-a069-4db2-be90-a861104444fb/24177606947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceefc10a-7a27-4491-b34b-23689f029a94/ludo_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227c9d53-773d-4c6e-b8a7-f6a07a9ad3b0/zobifanikebafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5158/9018/files/51373588196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5478/7477/files/top_editing_apps_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0278/9525/files/92817136600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e88a7a-ad91-495f-8714-f09b693665b4/67044555258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44db7d36-422f-4920-a2d5-279825c9a82d/7883652108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716907d8-a805-4a55-a1fb-acc1772f91cb/css3_media_queries_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ca867a-2e54-43fe-8b89-3ae3e7409c27/31037210497.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_off000064cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 5520 bytes
SHA-256: eecaad0e845c9f8ede7bac13d98571672ae5f86fc7c86d7d7c2e173abd373b29
font_01_sfnt_off0000777f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777F 10760 bytes
SHA-256: dcdb777e1589b80b9c68cbad3e50df2e21750f4a89a653374917679f429b9259

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