Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e087a490ca1f91…

MALICIOUS

PDF

38.3 KB Created: 2020-11-03 23:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97cdf312ec91728768960168c9575d0d SHA-1: 9f518fe584e3b4c82d050ef796a55ce36acf1555 SHA-256: d5e087a490ca1f913c4dd27bbf05f4843e3229d9a225107cdb48ef877d7bf347
194 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, masquerading as a document about the advantages of plastic bags. The primary malicious URL identified is https://ttraff.cc/123?keyword=advantages+of+plastic+bag. This technique is commonly used in phishing campaigns to distribute further malware or lead users to credential harvesting pages.

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.cc/123?keyword=advantages+of+plastic+bag In PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/9342582.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/9611648.pdfIn PDF document text
    • https://nevitasez.weebly.com/uploads/1/3/4/3/134305442/c5e257.pdfIn PDF document text
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/zipof_morusanilapafen.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f9234cdd9a03.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/4c53ce4e-4830-4669-b217-46ebfe436e4d/airsoft_upgrade_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6d2d41-92e1-4be2-b2ed-887f15a728e7/the_well_crafted_argument.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54260224-ca87-43dd-88df-6b732b8dcc7e/nexovazexofixeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3537766-f4f4-4d8b-ac1c-be16e107b871/tusonuposazonumivaleti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c11664-5008-4425-8f85-b77866ddfe73/35369528430.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_off000058a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A3 5416 bytes
SHA-256: 504e189ca7acb65506b46cc2c54d643bfeef85631247900edd99090a8b55bfb7
font_01_sfnt_off00006b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B30 9928 bytes
SHA-256: b9732387f007514f3e64ddf541cf26b0af4e1eef7a9e38f213216f92d6461fee