Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcd3a572f0453b6…

MALICIOUS

PDF

44.4 KB Created: 2020-11-02 13:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9366acb49c5233ff00cef953011e1d4a SHA-1: 7bc8eeb5f8705fa6a8dd990ebdd8b455bd71069b SHA-256: 3dcd3a572f0453b67240a43b57eb00d8013e5deb2910a420edd6260020ed9421
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting it's part of a phishing or malware distribution scheme. The embedded URL 'https://ttraff.club/123?keyword=mr.+watson+wells+fargo' is identified as a malicious redirector, likely leading to a malicious payload or phishing page. The ML classifier strongly supports the malicious verdict.

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.club/123?keyword=mr.+watson+wells+fargo In PDF document text
    • https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/3093488.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/1505414.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/d8b4f785f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7398/7244/files/vefupurisodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf25e19-2cb5-4566-b0be-5c6b1c09a38f/30607104954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50519954-4c5a-420f-973c-4078762549ad/94503662712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24455805-c25c-487f-8e48-a5c8d14ac012/52137747439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b037c9a-2e2d-4643-8dee-05a718410844/pirumiteponusujiguje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb669faa-0d9d-41cd-aff5-f0c0e587e2ef/26695332621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cbb1b2-18df-4564-9f8a-fc6eb89dd46f/70950909213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8989/6645/files/metronome_beats_pro_apk_3.9.0.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_off00006e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 5064 bytes
SHA-256: 70527162e9d6597c639fb919fdbd2fca126deb68b8635665be125cc62ffac3f4
font_01_sfnt_off00007ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 10952 bytes
SHA-256: 76f22218eada8b4c65e7b43cce150c873fef72c4fa5d63c12e1c515473ad2076