Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ebf48d3a5cf7c0…

MALICIOUS

PDF

49.7 KB Created: 2020-10-15 03:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c77ccd81acf843eb1fdbb96dc0d485ad SHA-1: 22e2a3e2bbde0d4a87d65bbbb72badac746de039 SHA-256: b3ebf48d3a5cf7c0fbab8ee0a91524749803940ed431dfac2979c95c775dc078
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=sweet+bird+of+youth+analysis+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f87133fb58b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f87866a7d14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5f875b861e119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8788c80e9d5.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/f79b5557db55.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1441493.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/revowo-mutitikiva-wiwegovinajo-tuxatusejuze.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/2196630.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/83905a54a030772.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/zegabileniwiv.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/b19d5f99-45e1-4fd0-bfb3-a13cf1ab4a1f/lepilopulatike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d521e080-0406-4231-8bac-92f471bb4788/41112933064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a87a8aef-0cd4-4447-9c35-60fadc6790b9/67384553189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381b93ac-d4ce-40bc-99c8-a3d30d017d61/lilumaxexef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48cf6477-b461-48e1-81da-94210b3e196b/dawogupukojufabalori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9346/8331/files/intermediate_accounting_16th_edition_chapter_10_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1388/8936/files/au_clair_de_la_lune_ukulele_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/intro_to_moles_worksheet_chemquest_30.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3059/9064/files/64652529774.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_off0000762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 5448 bytes
SHA-256: 75d6c6f987d0112abed65b1c8cc7b88c4a358c3c01ca2458265bc44d7a72dca2
font_01_sfnt_off000088b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B7 10156 bytes
SHA-256: cd91ff7a2d459184f97290802ff177204f18b6d9c78f07365c123801b52f65c3
font_02_sfnt_off0000ab77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB77 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f