Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f3256c2f283fbf…

MALICIOUS

PDF

46.3 KB Created: 2020-10-27 07:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 5af660451a5206e4201f86fff85bfae9 SHA-1: cf475cde60802c167de389d7808bd424786395b4 SHA-256: a0f3256c2f283fbf9b27d6dd4584d1d6ca5170040fd43dbf32c8e6c9e092e159
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=all+my+friends+are+dead+book+tiktok In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f89b8dc095cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f89312f13f66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5f94a9bf17e37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f91c6524e1eb.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/2110181.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/poritabazegesum.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/4540722.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4d5351fbb209c0.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/5419d25aff.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posufij/biblioteca_sud.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/1663838111.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/cyclotron_and_betatron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30eef7df-9fde-4726-b3a0-471c6b77af2a/gojofezovos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61217b2d-aeef-4c49-807d-963e17500364/65178684226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0654/6079/files/apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1957/4689/files/jvc_kd-s28_wiring_harness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8873/5125/files/water_cycle_in_a_bag_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9884/7428/files/wefuzumagali.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 5348 bytes
SHA-256: 6d16af918ab24903c6ac1ab6ab5e90edf3277be07f7c7743a07b970a5f13fcd5
font_01_sfnt_off00006d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 10788 bytes
SHA-256: 3d4d014862510f1a6182f4095d39b6bfc4d0b2d9b19c6871ba09d90da7aed492
font_02_sfnt_off0000928d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928D 17084 bytes
SHA-256: 009c17bfe57b7d8258b771bf126a550d5105910e838c6f5a9a26685aec491593