Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffeabe8ff900824…

MALICIOUS

PDF

45.3 KB Created: 2020-08-17 07:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 23772437a1ab96a23e126b2d6634bca9 SHA-1: 2b593d2eb336640af6259055be338419ce0616eb SHA-256: 0ffeabe8ff9008241655b6e8c7677bda2f2f9f3eea5b4741b3f56aa78894b916
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.com/pify?keyword=project+interim+report+template In PDF document text
    • http://files.flowerofcarmelhermitage.org/uploads/1/3/0/8/130813550/genupaka.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/1/0428/9835/8432/files/71340125447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/81772424035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/hybrid_network_topology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/tarilatosaraxutuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/possessivartikel_bungen_a1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/cessna_172p_poh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/xesuzin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/diziferag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/66991258640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/free_barcode_font_for.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/dimezuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/9251942022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/catholic_wedding_program_template.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_off00006342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 4764 bytes
SHA-256: a07e4ebde5cd9cc749fae2dc661e5e2410d1ab28d33c74c1951d99913c31409c
font_01_sfnt_off0000734b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 12364 bytes
SHA-256: 813e6a162f73e66769d31c441c12199fa934fea62576a62d850ba2f5b024b48f
font_02_sfnt_off00009a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A39 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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