Malicious PDF — malware analysis report

Static analysis result for SHA-256 902bfc9a72faf4bd…

MALICIOUS

PDF

44.7 KB Created: 2020-10-06 21:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 632fa326fc3965932aa2b30920a9fa4a SHA-1: 75f9edf9944352c3bdc21c0f206a0a1301b37553 SHA-256: 902bfc9a72faf4bdc37e6b4d10f02871966f1b96c9ed4c2066d7c7b6e9c889cd
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.club/pify?keyword=the+book+of+symbols+pdf In PDF document text
    • http://files.brettstotalstumpgrinding.com/uploads/1/3/0/7/130739831/vapizobaso-rejezizoranigi-gofuju.pdfIn PDF document text
    • http://porutomik.gratiotcountyquilttrail.com/uploads/1/3/1/4/131437241/vesife.pdfIn PDF document text
    • http://files.fantasticfrocks.com/uploads/1/3/1/4/131438128/vipiwutuwigodowivo.pdfIn PDF document text
    • http://files.watergateatlandmark.com/uploads/1/3/0/9/130969874/xurakigejozo_zemimijan_kikaditapebi.pdfIn PDF document text
    • https://site-1038743.mozfiles.com/files/1038743/zugotitala.pdfIn PDF document text
    • https://site-1038709.mozfiles.com/files/1038709/55081742858.pdfIn PDF document text
    • https://site-1040282.mozfiles.com/files/1040282/suzozalev.pdfIn PDF document text
    • https://site-1040685.mozfiles.com/files/1040685/95609154855.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/1/0441/0654/7352/files/macbeth_play_modern_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3751/0817/files/landmann_fire_pit_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6027/8949/files/76422916349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0688/5031/files/geometry_chapter_4_resource_book_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9231/9650/files/econ_304_final_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8650/6912/files/wekepivuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2100/8548/files/rei_flash_55_pack_review.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_off00007195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7195 5232 bytes
SHA-256: 0f850daeea05608bf436c0fd245fa837ab26022063c983d5262016a2aa40c139
font_01_sfnt_off00008346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 10120 bytes
SHA-256: b918a45e66a6904c72af996246c24453526c9231de51dbdb435ba5edb268662a

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