Malicious PDF — malware analysis report

Static analysis result for SHA-256 c15a3f852d73da06…

MALICIOUS

PDF

44.8 KB Created: 2020-10-17 07:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 135a12042417bc02e6987cc2501f064b SHA-1: e279af1069e8b340cf89182335a11ea0f9f48efe SHA-256: c15a3f852d73da06c9e9476295b2afc6ae7be4df1a4280d1a9a06992462eb691
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/123?keyword=sanitary+napkin+business+in+bangladesh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f893f08a00a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f874cf914a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8a33a099bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f87436e8593d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f875cfa2a89f.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/ac13d768-5c2b-4c50-91df-387488ba3add/xekotopiliwor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c256be-c865-48a8-a200-57e68967e768/93621279610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36e68a9-59a0-450d-87a4-c02f81a83dab/gofeleva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8543/8884/files/kurozifen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/teachers_day_odia_speech.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9377/9143/files/top_android_games_support_controller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7846/0590/files/respiracion_cardio_pulmonar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7339/7418/files/sutujepejatogezujid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6560/1959/files/nobike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3302/0584/files/zuvisosased.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/nslc_salary_disclosure_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/pesorodot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9089/4755/files/37385314520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0438/1349/files/an_introduction_to_quantum_mechanics_griffiths_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9462/9270/files/how_to_get_free_nanas_on_appnana_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4752/9895/files/53134948221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/depobubomifuzagatavexepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1480/6440/files/dd_5e_witcher_build.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_off00006e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 5628 bytes
SHA-256: f5fe1e54da5ac6b7fc01129cb54587acc83f2c8661d3f632458bd020ea6a65dc
font_01_sfnt_off0000811a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 10848 bytes
SHA-256: cf7235d8b6779b37d10b77cb7b0bed2b1b0bcac6188a10d27f40f0f4a36eb417

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