Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d9601ae4bd676e…

MALICIOUS

PDF

46.6 KB Created: 2020-10-25 09:34:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: f95e8a7aeae163d49b2c379a54c7758c SHA-1: df5ad1d2cb51bcec039a1fbcd5661e6cafc0cf57 SHA-256: d9d9601ae4bd676eb775a5e18017bc970d97b24c7e38ea1d9790b12e40a80839
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=verb+have+has+exercises+pdf In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/guteporakew.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/debubaj.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gigufoteworakef-bezari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f886585a89ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387582/normal_5f9158f364f69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f913221327b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8a5f17c30dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8a8b5ceb221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5f8c90e2ac0a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8809f6efc3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b094e6fe-0a20-4885-9a1d-2f23501e9bbe/wojedazogajitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b3cc32-201f-4d2b-ab8c-e673d020e6e6/89943408838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4171/8950/files/posiniguleguwikarudafaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6855/0037/files/84173851314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7458449b-07d5-41d9-bb4f-c77600fe75f0/purble_place_descargar_para_celular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e33e402-bbc9-4317-afc4-52120775d347/romadefawowitapamarakib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 4936 bytes
SHA-256: cc8b94ef5e9ce73dc44fe6c3266bb67f9275f7318e82a66b16bd8cb2827b32ce
font_01_sfnt_off00007b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 10596 bytes
SHA-256: 239e9e4b45bf065b7993900a0ed99463a5421480513facf0d506f8817ac87a15
font_02_sfnt_off00009f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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