Malicious PDF — malware analysis report

Static analysis result for SHA-256 681ab0627924b971…

MALICIOUS

PDF

47.0 KB Created: 2020-10-29 19:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4921bc7b08db2b20bd7e79ea58c275d5 SHA-1: b771cfd9175331203040d16b5b8145ca569fd1e9 SHA-256: 681ab0627924b9712ea89ae53bf4705886045498948a271ba804d9a8b871dc31
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://cctraff.ru/aws?keyword=hobart+handler+210+mvp+vs+millermatic+211'. This URL is likely used to host phishing content or distribute malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in the document body indicates a likely attempt to lure the user 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://cctraff.ru/aws?keyword=hobart+handler+210+mvp+vs+millermatic+211 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5f932b2e7548b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5f8ccafc12960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/business_english_letter_writing_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/18679905985.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/94447225574.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/dazixatenojodamowu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/mutexojemul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935cc6bf-f5c0-43d9-b977-8275f82af282/68958100700.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/manual_practico_de_aceites_esenciales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a77a73-f41f-4c24-b7ce-1ccd3700763a/missy_ryan_debby_ryan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af26bda-c2cb-4f40-8efa-ec7a2cacd165/glencoe_mcgraw_hill_new_york_geometry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/nekimukef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e09801-e298-40a6-abfd-7b9a01748e90/13086074918.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_off000076c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C7 5800 bytes
SHA-256: 2602cafe220b4175d826475fbdbfb9dfd7f2dc7bbea847550397bcc500fe44a0
font_01_sfnt_off00008a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 10800 bytes
SHA-256: 6f9485500c6eb80c2a27825aff2a976ac8fb63f499c4ad9710d404ee07f25c5b