Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9e29594ba561f0…

MALICIOUS

PDF

35.4 KB Created: 2020-10-04 08:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4247f91674cc9946b9b96b9b9059ea06 SHA-1: ecad3438253942bf52e665eb0dd2301ed9974691 SHA-256: 1f9e29594ba561f0a4da0226f11ad4fbaa8a760e40e84e80c63dcd3a7521f7aa
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://ggtraff.ru/strik?keyword=global+business+mike+peng+4th+editio In PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/viranuzonamodazas.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/73101624301.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/lebit.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/23627877361.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/bepodigubuwon.pdfIn PDF document text
    • http://wawap.topdogracing.com/uploads/1/3/1/6/131606490/6993500.pdfIn PDF document text
    • http://files.debbiechristie.com/uploads/1/3/1/3/131379353/siberove-juloxukilewori-dowib-nuvolusakut.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/1/0486/4173/6862/files/nafusatupulutiwotetosewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/lisanerubazijegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/weathering_and_erosion_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2555/8436/files/nkata_del_gormo_master.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8442/6645/files/sifurakisesomegifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3294/8129/files/kitchenaid_7_speed_hand_mixer_replacement_beaters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/43516213997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/jegavaxifavifotude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3754/3578/files/tiwuti.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_off00004976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4976 5600 bytes
SHA-256: a3ac81b082ad4880b14f7d94583b2632ed0623ece70254d758f3ff16166c0a04
font_01_sfnt_off00005c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 10028 bytes
SHA-256: b96b88d4ec4e0ccd4f5a86bb0a12d7f77cc164ca1c2b342c886bdf09ce48544d

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