Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af9d906b32d36c9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-28 09:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2ab98853e70342113559c266e875705b SHA-1: b6d01957f54eba9316e5c424a84e10f2cecb9d68 SHA-256: 7af9d906b32d36c9b7ee429271111e67d38fcf328546c2f3472bd1fffaa3840a
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.cc/pify?keyword=pax+christi+usa In PDF document text
    • http://files.villaavanti.com/uploads/1/3/0/9/130969377/3d6c7c42.pdfIn PDF document text
    • http://bikemu.watertownfordrentals.com/uploads/1/3/1/3/131383332/364987.pdfIn PDF document text
    • http://files.libertycraftbrewing.com/uploads/1/3/0/8/130813320/bekonapolarov-kalososugug-bafesagijez.pdfIn PDF document text
    • http://dapef.livebeautifully.us/uploads/1/3/0/7/130775639/233603.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://cdn.shopify.com/s/files/1/0443/4483/6252/files/85293205685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7443/5737/files/ielts_speaking_part_2_questions_and_answers_top_50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/household_expenses_excel_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/pujevixabovomonus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/1952/8348/files/wizafatodamenazatevanur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9115/6380/files/33984083802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/dobototafuvagaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/jopade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/aleister_crowley_o_livro_da_lei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/91988784900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7335/files/84821285542.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_off0000656c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 4472 bytes
SHA-256: 2e3562889a8ef5cd51d877c213ff872d139c2dba4e533d58456fcd9a0b2ff9ef
font_01_sfnt_off000074a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A7 9980 bytes
SHA-256: 3a3d3b97d61f738a4f78c3d065cf1fdd57d567a1bc14a00ba08b54443a5e17e0
font_02_sfnt_off000096d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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