Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bc98206626c2e8…

MALICIOUS

PDF

46.0 KB Created: 2020-10-15 14:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c702a9633ca424d0b21c218b3c6c76e3 SHA-1: 0778e3fe9bcea16b9a8a383ba5ed686ca0ff5cc8 SHA-256: 54bc98206626c2e88fca705d4089a5144a983735acb524af8adf1e71d811a870
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, cctraff.ru, which is disguised as recruitment information. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this. The document likely serves as a lure to redirect the user to malicious content or a phishing page.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=territorial+army+officer+recruitment+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87c002681d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f874d6d39fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f877b9bcb485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87c679f0915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f882bbd72a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f879cc25c074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f881a17db3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f880aca59b8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f874676cf1b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f870bdf50d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f876ba9846c9.pdfIn PDF document text
    • https://site-1038998.mozfiles.com/files/1038998/vajusibe.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/kelupupezosiwujew.pdfIn PDF document text
    • https://site-1040177.mozfiles.com/files/1040177/subuwirukafamu.pdfIn PDF document text
    • https://site-1039404.mozfiles.com/files/1039404/bufelusarodofisat.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/855f7dc3-3be1-4be6-bef6-2b3f0e816deb/88013275250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c17453c-e8e8-416b-903e-751128d9ceb6/7682986124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827efbb5-e70f-4952-8ded-2995fb9d17c6/53704299432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86704ac-a941-44ff-a573-f531218a6965/51331240143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56550f2c-2cf3-401a-bd8d-a5490d725a50/ximofolawoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/111eda26-5b66-4abe-937a-3f3d4470aa47/meletumutaxenirojitoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5263b29f-3c2f-4ccc-945b-0ab9fbec2ca0/lezilivapadetimuraxasip.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_off000075a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A3 5448 bytes
SHA-256: 7674cbbb3731dfc4fe5fa1e6c9eab0e471b6814797b86bdb2706f4044b1482a7
font_01_sfnt_off0000881b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881B 9968 bytes
SHA-256: d2d86ba1f56d904eff37fccbd239694507c83956fc6e33a100b98e1906cd7f1d

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