Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e896248096fce66…

MALICIOUS

PDF

46.3 KB Created: 2020-10-17 23:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 220b2a8a9290af6c1dce62fa09120c59 SHA-1: 0040236da0863a0bb6a9743d168e1630bb73ce34 SHA-256: 2e896248096fce66991643d56b67714c83f29339151929145b54679ccfb8bf0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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.
  • 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/123?keyword=math+division+worksheets+grade+6 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8b310a6ad0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f8b1042b6872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8730ab80ec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8a545ebf814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f896e7321644.pdfIn PDF document text
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/bozakuluguku_zuzozotunofem_kopenifev_fuxijirun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/22946961675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8320/5281/files/mountain_bike_games_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/wawibuwudukinigikot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4970/5881/files/home_plate_terrace_target_field.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/19829887289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/game_gem_apk_ios_download_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0119/files/zujazanujok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6493/1992/files/download_grid_untuk_instagram_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d68310-202b-4c59-ad0d-1f20de5d49ae/berefiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad66cd54-bace-4c56-b79a-4903f47f7ecd/wugibutetemabunadijuruped.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0903c16-7e4a-44ae-92b4-0b95ccf3f3e4/potewerigiwuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e65a7cb-9a9c-4978-9b15-daf17429c5f7/gomixipiriliregixad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6763/0272/files/wow_classic_hunter_fast_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1135/7851/files/free_roblox_gift_cards_codes_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/indic_keyboard_telugu_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7755/8168/files/ruwosigoxoxipuvefixon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/1187964894.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_off00007589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 5432 bytes
SHA-256: ef945891db5e3ab72bea58b76d7d15668e8818a86cc24b430c197a2f7201be45
font_01_sfnt_off0000881a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881A 10536 bytes
SHA-256: 7ce27148953cba5bb22b9b00304ed940785829a3aa09d682f45b046850c702f4

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