Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf26df89712589ac…

MALICIOUS

PDF

34.0 KB Created: 2020-11-02 07:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5aeccb999682a61e6ab75a7bd7c7502b SHA-1: 1469644f280c888650f7b3fcc609837e1194433a SHA-256: bf26df89712589ac27cc3ed81f84c2d3bdb1bb4cc2398a22da5175a48d932c15
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to trick users into clicking it.

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.link/123?keyword=predicting+molecular+shape+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f87620b944b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5f90e00639364.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/a2ae1434-fdb1-4ab9-a96e-c23143a961e0/94823462470.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/luxaximivakajuwapifujuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8faba126-bce1-4c19-a07d-0f3b1c1676e2/dutejufofixul.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/didopilexezomupevaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded7f4ce-2bf7-4c98-9f39-4db41b6bc7b3/western_union_money_transfer_form_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a431b12-559d-4a2a-a3c9-67f5adf90e3a/zasufewosetajafol.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/arihant_ccc_book_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/langrisser_upcoming_banners.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/free_offline_mod_apk_games.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/catalogue_noel_carrefour.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_off00004760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4760 5644 bytes
SHA-256: 2cf85d16309d20fe4433dbd29f5f099788a5eec43ace23b00cac607ba8b454bb
font_01_sfnt_off00005a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A71 9660 bytes
SHA-256: 001b497abafcf1be2632bbfdbbbc16c713e555e2254fb85a856e38c7198fa555