Malicious PDF — malware analysis report

Static analysis result for SHA-256 61733a020469841e…

MALICIOUS

PDF

41.5 KB Created: 2020-10-16 00:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9d063e370c1b934f442381d23bdd7f42 SHA-1: dfba6b60517eaaa6f86b31f458c7515acf99c4e8 SHA-256: 61733a020469841ecbd4b728b6334d8f5690a758b290e544f9eb2888fe87788b
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://gettraff.ru/pify?keyword=types+of+dbms+pdf In PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/51650555317.pdfIn PDF document text
    • https://site-1043248.mozfiles.com/files/1043248/46384482038.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/19764800414.pdfIn PDF document text
    • https://site-1038304.mozfiles.com/files/1038304/3103866373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87630071a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8758ae64871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f88bba0d86f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8743182cd1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8776a5e6c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f88bf78643da.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/1/0428/8249/8716/files/95712628649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9721/8471/files/14470291607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4585/8711/files/87434464471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2309/7766/files/hide_on_screen_keyboard_android_bluetooth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6750/2503/files/41390738602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9875/1135/files/bitesasupi.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_off000068c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 5040 bytes
SHA-256: 43e1ccf7edc894356b673792cd16e4cb707a0ee3c2d0da4bf690034a86d8cfce
font_01_sfnt_off000079e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E0 9284 bytes
SHA-256: 31ec3446388da474ef66ef0693b9928ae9498cc37787f06f5b27f07346583fab

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