Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56a09aa1965a798…

MALICIOUS

PDF

43.5 KB Created: 2020-11-03 01:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 770cb79a1fce68a02b9ae6e33f53379b SHA-1: 99170ba5c4a6ae1cca7c000c761c26fd5b5ccb45 SHA-256: a56a09aa1965a79800b3b8dcec8656a379a006a2927927639ba7399d44783e85
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL 'https://ttraff.me/pify?keyword=hacked+games+balloon+tower+defense+3', suggesting a lure to a malicious site. The presence of a link farm and the ML classifier's high confidence score indicate malicious intent.

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.me/pify?keyword=hacked+games+balloon+tower+defense+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8cb535563ae.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/1242677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8ba9c047b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5f9bf24c9d7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5f9ee764644b8.pdfIn PDF document text
    • https://folatidaxewurel.weebly.com/uploads/1/3/4/3/134317863/6159698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5f93f21b3cfd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f8a8bcef2ee6.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/genedonapubefe/bolt_size_chart_metric.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16292b64-598b-481b-9550-fa8f0cdda3f2/free_soap_making_guide_ebooks.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/91808386727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef349380-70a5-4d9e-895e-a4d6bf4cf79d/nitrogen_ionization_energy.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_off000069d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 5760 bytes
SHA-256: 4dd8ee64d5c83a95c8845c9f48246bfc40d47b761e4d04df2d875573155870e8
font_01_sfnt_off00007d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D79 10532 bytes
SHA-256: e322178248223302f2b15df98816b3a33d6a717554917524793e3598be3bc362

Open this report in the interactive analyzer, or submit your own file for analysis.