Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa5232f34105683…

MALICIOUS

PDF

52.8 KB Created: 2020-10-12 06:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d363ba23bd5cdec61701f69460392cc5 SHA-1: 231c51e789b0cbe6415cf69377c0ef1e7bcd9eb1 SHA-256: 1fa5232f34105683ed4ce83fa20867761c50367793a0b99f1562480ff66d5486
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.link/pify?keyword=evolution+ppt+questions+answers In PDF document text
    • https://site-1044300.mozfiles.com/files/1044300/jamofobabujazov.pdfIn PDF document text
    • https://site-1043699.mozfiles.com/files/1043699/84622269568.pdfIn PDF document text
    • https://site-1044015.mozfiles.com/files/1044015/23600433159.pdfIn PDF document text
    • http://files.elizabethwheeler1.com/uploads/1/3/1/1/131164034/dozuw-vogixesiteme-kukipubo-gidojowomenu.pdfIn PDF document text
    • http://zevifil.maahomestead.com/uploads/1/3/2/8/132815176/221403.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a1557-993e-4201-a4e8-4460621147eb/fifomof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2a95e4-d4a5-426b-b75a-88fc62247951/nelowibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d49e855-5e8d-40ad-a108-cef13b842d5f/71070142805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83f28a6-93dc-4f0d-882d-8d0de39a3687/jubeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226f8552-de81-4c01-89ef-a54370a6efdc/60233656327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/jaguar_f_pace_manual_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2645/9035/files/globalrph_dilution_keppra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2890/8701/files/shop-vac_10-gallon_4-hp_portable_wet_dry_shop_vacuum.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_off00008f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F17 5048 bytes
SHA-256: a3921db88b384feecd33b95fa88ea09a3db1c6e7f51b2dcbc1acdfc62740eb02
font_01_sfnt_off0000a073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 11024 bytes
SHA-256: 78849cdc5a58143e7af5584070f553558b55fff6db710ac3bbca22945d895f78

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