Malicious PDF — malware analysis report

Static analysis result for SHA-256 5557d01ccdd40ddc…

MALICIOUS

PDF

41.8 KB Created: 2020-10-28 21:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f8fbc8a4dbd8e778ac8f7b52eeeb2cac SHA-1: 85ee1ce6cc8508228c1a1d5eb63dcedad2d39153 SHA-256: 5557d01ccdd40ddcc0eaa24fad33b348c63389d02fe0cc5385714acf39e9e95f
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=witch+hazel+in+japanese'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of a malicious URL indicates an attempt to redirect the user to a potentially harmful 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://ttraff.me/pify?keyword=witch+hazel+in+japanese In PDF document text
    • https://furifusopuwebe.weebly.com/uploads/1/3/4/4/134471692/d5008fd4.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8055/7755/files/47489353626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87014d5-cb86-45e6-80bf-7f96196b8ab8/minecraft_code_to_download_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/tamizisiwuwiferibisolasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4255cf-5660-436d-aa5a-661fae4c9674/kopezomukirigag.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/namma_metro_route_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571780f4-b712-42ef-a693-d6902cf634ee/karove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/g_switch_3_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/59357335827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bdb910-0ac7-469f-a9fc-e1bfdce23ca8/nesuwopivelowemimi.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/advanced_excel_functions_tutorials_point.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_off00006492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 5064 bytes
SHA-256: 22883163931846abe8710df5007743bd3be9cc3282530a47c75c44fe3564c5ee
font_01_sfnt_off000075ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 10784 bytes
SHA-256: 1b5c316122a7bc4317d5be7fd2483e515c31e6a889069606653c995241b61cab