Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a03ef681c671a55…

MALICIOUS

PDF

52.2 KB Created: 2020-10-29 23:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 90af64623efbb9ae4466883751ef1c41 SHA-1: 4ddb58686bbe515e17531d953d6bff3db81fd4e1 SHA-256: 2a03ef681c671a5504585175050b3b00ba994705afcf192fe513836c40b06f29
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link disguised as a manual for a "Presto professional salad shooter". This link, https://ttraff.ru/123?keyword=presto+professional+salad+shooter+manual, is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/123?keyword=presto+professional+salad+shooter+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5f8c88a23e65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f904a6cd329a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f9b21484caea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f97c29cacc45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f94de23503f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f8e95a13a050.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/50b168fb-9f14-4155-b42b-29331fb05e20/bevevofidepatubasolizapab.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/baciloscopia_tecnica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53a168c-4c6f-4592-98ab-d7ffe94c5575/cox_cable_tv_guide_pensacola_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f157a9-249a-48de-b03f-d166ae5f8bee/zowaduda.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/fcc_form_605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd887ca2-fe56-4952-98ec-d39e0c5c5d6d/52683103757.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/41581700127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cd12e5-6293-4c4f-8667-498886bf37a2/87357819739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16d045e-397f-4c62-a42b-6af0964c911e/kizevakumuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c7a0d4-1975-4d10-90c0-350d49b182eb/sozamet.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D68 5280 bytes
SHA-256: 722c0b8bca85cd8a31215c659d8610692303917a9009bf2fbb051be180236b7c
font_01_sfnt_off00008ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 1412 bytes
SHA-256: 5c50f4cb69aeee5b81095be8e666b92e3326533d48cbc43d292acdadbc1103ea
font_02_sfnt_off000096a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A9 13268 bytes
SHA-256: 85ff77041b141e3dc43187a2512fa1c68441cae773b09ca8830c954e027017f1

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