Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc0dde0d21929c9…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 14:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7eabf3155f7e3be04e42b3d9530a53a7 SHA-1: b41fb130bb72b39614850461172ca19563ac8b49 SHA-256: 9dc0dde0d21929c9cacafc19403270ce93c85eb0d885627cd8d7f21dd588bdb9
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.ru/pify?keyword=water+and+wastewater+treatment+book+pdf In PDF document text
    • http://files.postscriptshop.com/uploads/1/3/0/7/130739210/rowenatedadus.pdfIn PDF document text
    • http://files.conceptmedley.com/uploads/1/3/2/6/132695302/bapamunu-kekemaloka.pdfIn PDF document text
    • http://files.sydniessweetlife.com/uploads/1/3/0/8/130873876/leduk_gidubijapiwi_futapasejak_vimapiwoloxut.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/1/0440/1030/7749/files/exterior_angles_of_a_polygon_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0493/5835/files/tenegizenaxenamakenitob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/accounting_ratios_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/derubamafetigozekonobita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/how_to_covert_sas_to_spss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/64365499722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/duzulegosebiwolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1210/4103/files/posthuman_board_game_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1682/files/file_ti_v_b_li_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/kirifugelarozuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/babylon_s_ashes.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_off00006bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 5464 bytes
SHA-256: e7ebf4f317e760391dd5a30d61062c0b8b000ff2a8937b32599958f3bb621819
font_01_sfnt_off00007e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E70 9992 bytes
SHA-256: 24766232d8ef47a3e3a3c491f6e13ab29ed80f7bbb760da0020985ec901ea961

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