Malicious PDF — malware analysis report

Static analysis result for SHA-256 43356ccadb8657a8…

MALICIOUS

PDF

50.8 KB Created: 2020-10-31 20:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3322cfbd13becff31d2ba460006b8b6f SHA-1: d24e45286f537963fdb9e14bbacfc2ba02866404 SHA-256: 43356ccadb8657a8723052dd0b53186ca32015455d192df1e6ec9784ef53b2fb
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://gettraff.ru/aws?keyword=kolcraft+cloud+plus+lightweight+stroller, is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download site.

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://gettraff.ru/aws?keyword=kolcraft+cloud+plus+lightweight+stroller In PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/nidekikoboxaliture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8e3707bd65f.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/fovulosalagasixower.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/7f98863b-4b89-4ec0-9915-f150cd23d16c/letolubukiladudeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121a353d-6e88-42ed-9bbf-67b1a2d6aede/35120118522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4188bd40-14fa-4cd8-b1d2-c4e72b94ecd8/zotuziseworadamulosep.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/loxobilezatuvoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de2389b-c649-43c4-bda6-9c641c909e07/resikexebiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1cd802-bdb1-4982-9574-1c14c1533781/51775997292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cf4b3e-6bb8-429b-991d-9867808f339a/subedekafojerawilize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f49b74-4763-44cb-9e53-e279c41e9f4c/puthu_vellai_mazhai_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/inglourious_basterds_full_movie_in_hindi_watch_online_free.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000091f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x91F0 25460 bytes
SHA-256: a646adbdf63cd8ef72ea900eb849d78f3809e53bb2678dd209925d04f988db89
font_00_sfnt_off00005ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE3 5476 bytes
SHA-256: 81e264a82d08ab2e6250589b1db51670f7f64665eaa96d1d2a77e56f3f71090d
font_01_sfnt_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 10776 bytes
SHA-256: 1edb73d738c5d6272cf00daf1a94e342a72b39a41e76eadbee8a2f089799184a

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