Malicious PDF — malware analysis report

Static analysis result for SHA-256 232335ca06e47263…

MALICIOUS

PDF

40.3 KB Created: 2020-11-03 00:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3391c75f7d8a3bff82d2d5ce7588d72e SHA-1: 9e54e7545cd976ed00bdf78bc5f3b9222afa19c7 SHA-256: 232335ca06e47263151b1a1d9a86ae875238c239315ab85f41714fb8c37ea6c8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'https://ttraff.cc/123?keyword=48th+anniversary+gift+for+wife'. This link, along with others pointing to PDF files, suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or scam lure.

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=48th+anniversary+gift+for+wife In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f8f3a9a90b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f994e78679e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f8b76583ae47.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/8502473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_5f9663fe61862.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/78f4c1a549b16.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/pujinit/pixel_quest_unblocked_the_new_method.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/test_present_simple_continuous.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/4890020827.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/adjective_and_adverb_phrases_worksheets_with_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/8013/5870/files/mudikutim.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/43924417738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2995/2150/files/bomb_it_7_game.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_off00005f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 5440 bytes
SHA-256: 0ecc8093934681611837b90ee1856058dabd5b7be6670f4f3672fcb43bf27398
font_01_sfnt_off000071a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 10264 bytes
SHA-256: 5b0ba6df6fcfd9b4b8e1d3251b00a1f8f485cb968821384175e3bf25ed6e6144