Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d3ea21c991c71b…

MALICIOUS

PDF

55.6 KB Created: 2020-10-25 12:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-27
MD5: acde17b33429300f4e898b82c097d0f8 SHA-1: 588f8a35027f86b2c9b1242a0286c6ccafd9afdd SHA-256: c5d3ea21c991c71b1378ca04c64b0b43bd0fd3d10c127c756b25cdbf24ffaec4
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=different+types+of+cleavage In PDF document text
    • http://www.opentle.orgIn 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/ac12626e-f1c5-461b-af6a-dbdb9d716768/59540176864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2336a4-8e62-4a66-98b3-80d073f55c15/37667546949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c597e143-51e4-4a7e-8f7b-35bd9d86cfdd/fizevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c1887e-064d-4e0f-988c-5ab6957d16e6/42229192921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5222a99-174f-4b39-8ab2-ef0e0c11fa45/153432280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579f0d9c-7ad0-437c-bca9-b5c298660f22/fawedibebinivajopab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a41514c-5efa-4ab3-a6a1-9bf53f599e03/85526222493.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/54011158412.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/negative_effects_of_childhood_obesity.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/yasin_suresi_trke_meali.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/curso_de_frances_em_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/93494514169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/zikoxapevuribora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0540/0990/files/rurimukebotovarazekiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1136/4804/files/natus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6980/0089/files/easy_clarinet_songs_pop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6989/1494/files/narrative_worksheets_year_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7113/3597/files/21969805045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/botticelli_venus_and_mars_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/captivated_by_you_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/les_bronchopneumopathies_chroniques_obstructives.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/70762437368.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00008149.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8149 15160 bytes
SHA-256: be36362255302448a5b25745a110314f7cffafef422df0d5a186ac25f7eb4e8e
font_00_sfnt_off00006ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 5344 bytes
SHA-256: fb24defb9881f361b17a8122d0b023d1843f0f29c132881012845bc52f6698d2
font_02_sfnt_off0000ab36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB36 11196 bytes
SHA-256: b57d9cad116e33cdb48a8bea0d167800f68830b203b97d38b58237ea580b9406