Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca65145b5c2cb98…

MALICIOUS

PDF

44.1 KB Created: 2020-11-01 09:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1ae4a15ebc46e55a637eb9c73b72e713 SHA-1: 836be5012985c3b9e4b694b5aa2d94bd4e0ac7e8 SHA-256: 3ca65145b5c2cb98dd1e6b680978beca16ac2b0cffccbf0c41d2fbce2c32a4b5
94 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a download for game mods. The ML classifier and the critical heuristic firing strongly indicate malicious intent. The embedded URL points to known malicious infrastructure, likely serving as a lure to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/123?keyword=stalker+shadow+of+chernobyl+mods+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f933fa53e625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_5f88f399e6cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5f935cfba0ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f9c70eba139e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5f8d2ef9cf73d.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/1/0501/7131/4326/files/apple_time_capsule_2tb_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/bojuniroxekimorenitatame.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/62529861491.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/metal_forming_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/a_raisin_in_the_sun_ruth_pregnancy_quote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a987e36a-d7ad-4960-af29-1dc115b0b1a6/dedonep.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/fuxuzudexiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/52258013342.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_off00006cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 5760 bytes
SHA-256: 150ba9df67eb6abe3f0a36bed4f482da1db09e0c0e6fee4436cf80b6c3cf93fa
font_01_sfnt_off00008056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8056 10316 bytes
SHA-256: 2263aacf62b0a33b12336877a7e7ecb09ec7a9c42264d396d8d01d97d62bd92a