Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5fd04c423178e2…

MALICIOUS

PDF

41.1 KB Created: 2020-11-04 02:39:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e889a988bee38b50444c3b83d7b3de7 SHA-1: 418be034a2ac56c43780b0b2c1ad73a5823458af SHA-256: 4d5fd04c423178e25619b9ca7471ca1d34b0731e97fb3a9955c0fc2eac1a29b5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various platforms, suggesting a link farm or SEO poisoning attempt. One prominent link, 'https://ttraff.com/123?keyword=megan+henderson+fox+4', is flagged as a malicious redirector. The document body contains text related to 'Megan henderson fox 4' and the wkhtmltopdf application, likely used to generate the PDF, further supporting the lure for SEO or phishing.

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.
  • 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.
  • 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.com/123?keyword=megan+henderson+fox+4
    • https://cdn-cms.f-static.net/uploads/4421352/normal_5f96686c364a6.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/nomur_womewulivusev.pdf
    • https://fegilekupajot.weebly.com/uploads/1/3/4/4/134404616/notufoja-nugajugogep.pdf
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f9602d3ae426.pdf
    • https://sipasegeremiraf.weebly.com/uploads/1/3/4/4/134404187/madadawejok.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5fa1df6f1568a.pdf
    • https://cdn-cms.f-static.net/uploads/4383687/normal_5f9b646b37338.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f912ea1eca24.pdf
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/4336469.pdf
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fa1ebf7b9181.pdf
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f8b35fb7e277.pdf
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/5980267.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0498/5140/0391/files/textaufgaben_brche_6._klasse.pdf
    • https://s3.amazonaws.com/xanebavifamopez/cinderella_short_story_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d8.bin
cda86b311ed7b6acd1816ee97b3c6694c3a32ce2b8f01898c1ccaa552ab99ff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 5296 bytes
font_01_sfnt_off000073f1.bin
6f8cb2b72478c7c7dee96f7c530de229602f137483e74c0add46cbd3c7cd212f
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F1 10608 bytes