Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38792a9ebc61ba5…

MALICIOUS

PDF

41.1 KB Created: 2020-11-03 03:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 46e1a8e112a071234c378a0c058af2d1 SHA-1: e9ef514ac0ffe4efa5907356318cb3e240570ac0 SHA-256: f38792a9ebc61ba5d3b26fae3ee4a13aa9b737e3a90d8748c06473897f2d204e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://gettraff.ru/aws?keyword=chemical+bond+worksheet` is the primary indicator of this malicious redirection. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL within the document body is sufficient to classify it as a phishing or malware distribution attempt.

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=chemical+bond+worksheet In PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/499744.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/7179239.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.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/8331270e-3993-44e1-bb0a-7cdc9daf8f0f/rival_steamer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce5b2e48-106c-4357-b878-c023398af54d/78709459038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc17fe6f-8b63-4ef8-a436-bf9403d14dee/85700716173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7836/2296/files/red_dead_2_money_making_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1306f2bc-1e21-4796-b14e-6638b7019ab8/koxumudabaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6008/2888/files/how_much_are_ny_knicks_season_tickets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3063/9272/files/37572869420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5679/9637/files/dental_adventure_y8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ea871d-3291-4549-a846-624bab006827/96864919325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6baa66-7d2e-48ad-9247-f048c5a9a2a7/cheng_gu_suan_ming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8589/8938/files/iphone_4_battery_case_3000mah.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_off00006283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 5380 bytes
SHA-256: bb6bf216d1c8eec36e71f73f135627b98e11c85e960e03ce040766ed09b84886
font_01_sfnt_off000074a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 10452 bytes
SHA-256: bc17cf4342a7c0073ab20d29100b0c37ae85b0b763466784a8561ebb62e9c5b8

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