Malicious PDF — malware analysis report

Static analysis result for SHA-256 4229a015a90f8c05…

MALICIOUS

PDF

43.7 KB Created: 2020-10-19 05:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 45b069ac74c8a547b74660253a51da89 SHA-1: ba3186ae8156c7f41f9300ea036c9463af6827f9 SHA-256: 4229a015a90f8c05e0b3f93d825bb1636c9814b4361aaae16e2728a7184e89de
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.me/123?keyword=corso+disegno+tecnico+industriale+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f885c9a8756e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f88630bc136d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f86f8a0723a3.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/866f9c6956dfb96.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/865104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8a2565e30de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f873413bc404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5f87f6402b851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8caaf912d90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5f8cef45acb64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f87b65814499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f89c3fb47126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_5f8b207d20961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5f8cc35b99a17.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/c9e75be8-7759-4f4f-b766-6e85e397c4c7/wogabipefepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8747/1806/files/the_basketball_diaries_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/gadefudot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2927/4007/files/nar_code_of_ethics_final_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8077/7373/files/59101537149.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_off00006bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 5228 bytes
SHA-256: 3a2d8d80ea861b9ade3628bed6419afacdb6b689d6ba8c0000a7f56ad86b3931
font_01_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 10972 bytes
SHA-256: 74cef2b01df05ac9577621567f3bffa4ebe4ce12c4055aadae9cb54cd6ecce25