Malicious PDF — malware analysis report

Static analysis result for SHA-256 19127da4137da418…

MALICIOUS

PDF

53.2 KB Created: 2020-10-27 02:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0839396c02be3a26511acb7fe04ef98d SHA-1: 3de6294caf833ed72bc06a1ee4db6fd4d3750d2c SHA-256: 19127da4137da418309b2d174cb127b2f268221f65e001d1bd2a63aa152032f0
134 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it links to known malicious redirector infrastructure, specifically identified as 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to a malicious site, likely for phishing or to download further malware.

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.cc/123?keyword=kit+carson+colorado+hotels In 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/51cf39cc-7e27-4491-a8a6-5ad8d4cb25ba/noxozurikiratodovumotemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3e20c24-f807-486b-9cc7-0776a87126c6/mobok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c57763-654f-4335-8bf8-61ab46f6e9e0/92967477042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc95afab-e3aa-46e0-8faa-3507b648e68e/81752585001.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/34743251228.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/the_poetics_of_space_gaston.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/interesting_facts_about_universe.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/71589197867.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/bididafelobu.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/50683474344.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/brute_force_password_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80a7ed5-cb37-4776-8096-62db41c365fa/judepuduvanex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac78cd7-d8ca-4643-a91f-28302d45686f/didewuxufezanebasanew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8b9a71-951c-4d6b-ac17-2d310ee27f70/someone_like_you_sheet_music_with_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25043fd4-3201-46bb-b488-5ae2deea44fa/27441789675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51dab4f-c96d-4c8e-810d-1a830422182e/petave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9e5dd1-6e9b-4780-9fc4-81f1f346c1dd/peaceful_pill_handbook_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98cfa5d7-97b3-4527-b9b0-d335e637a5db/7486674707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffaa3550-14a0-4312-a9c4-ee895728017d/64656628270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a01c539c-977f-42d2-a933-1f59a9bcb1a3/komeno.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/7833115909.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/71750283730.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/lazuki.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/59263100134.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_off00009110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9110 4996 bytes
SHA-256: 6cc230074228997825ed685e885c8d9bef5323a0d6a0d1a8c154fe5ef2d6fdc4
font_01_sfnt_off0000a1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F6 11028 bytes
SHA-256: af04b0ce31d86bb951d4b826444dac58061cec38ee61975b82502e296013f4f8