Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7bb8da7227f66b9…

MALICIOUS

PDF

38.2 KB Created: 2020-08-17 17:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be638ada742cd41fdb7551f5698fb870 SHA-1: 2efcd98719dfba6aa66caef2f4f6d1d05bceffd4 SHA-256: e7bb8da7227f66b9d2c796518c93c85785ea745e9fb62ebb35e8a4edbc9c46f3
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=chakli+recipe+in+marathi+video In PDF document text
    • http://tobimi.westcaldercatholicchurch.org/uploads/1/3/0/8/130815026/256fbd9.pdfIn PDF document text
    • http://files.i4ingenuity.co.uk/uploads/1/3/0/7/130739015/pajirafuzufa.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/1/0433/7660/7390/files/daxapukome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/trumpet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/patawidexoleguzotigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/grind_on_me_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/48347073519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/mabir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/bdubs_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/16906574467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/cetoacidosis_diabetica_harrison.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/vimanam_film_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/46674362262.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_off00004e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9F 5072 bytes
SHA-256: 84cd253e594e7569610bb6fd1e5266f5452bc42c508170167c0f9e8de2e94cb6
font_01_sfnt_off00005fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 8916 bytes
SHA-256: ca36f398dea7c8591ac4c0a0f64ce6da0506715110bdebf08a4f13274b803332
font_02_sfnt_off00007e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361