Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecd88f94f2f6612…

MALICIOUS

PDF

49.6 KB Created: 2020-10-23 10:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 222108bcb47166d390cb82f4bc068357 SHA-1: abdc90c43d72d8eb7da31f11860ae803272bfcad SHA-256: 8ecd88f94f2f6612cd53d9dac54d008900002c6b8370649bbbfc6f271be34ea8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.link/pify?keyword=slope+stability+soil+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9035ff57bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_5f89bb5d53480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f882b9268aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_5f89b15567901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5f8f8c57271d1.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/leguvefu/63609195310.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/merge_files_into_one_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/65648770861.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/80139312693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c523b6d-97fe-4f83-ba04-11de9405391d/sifadukijowasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08aa3da6-a92a-4f58-9772-fe19f8e137de/dovelujutatibajagoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/android_elevation_shadow_change_direction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/1367/0565/files/poplar_bluff_mo_restaurants_open_christmas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7411/8334/files/carter_grayson_sandi_lynn_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ea92e0-026d-4d34-9747-2034946e4bcf/nosajutefeberemane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1da7a4c-4965-413f-8183-390592aa789b/18609603982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccce18b-71d9-40e0-853c-2ec1fb81ade9/family_feud_fast_money_questions_and.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612be49b-925d-471d-b3cc-a34d631fa014/zasurusufevezonebiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0356ebc-040c-402b-bf20-31d61d3f2a5e/imperial_carnival_glass_identification_and_value_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c54dc82-1e90-4ccd-9bf1-689877036548/farixudosumaxupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbbe91d-d788-4405-a6fe-7a314407d26a/6384982773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d0994f-018c-46e7-95a6-6288d0e96b51/wuvejoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f582fdf7-b3ec-403f-b3b0-178ee020f26b/11889318443.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_off0000814c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 5284 bytes
SHA-256: ac5eeb9fff00bd901a69b2758c4a8acf12e8e7dbd4c3b46215525730706b8362
font_01_sfnt_off00009355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9355 10940 bytes
SHA-256: 38d44729d5172df2d2a6da5f8018e75114489e1b5e753645734a4f8484620407