Malicious PDF — malware analysis report

Static analysis result for SHA-256 8039275583924455…

MALICIOUS

PDF

39.5 KB Created: 2020-11-03 19:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf4016c3cd7ee6babbc7e6d138d18501 SHA-1: bd43afe8d1032fe51cf36718b8df4c322a9b479c SHA-256: 803927558392445595216744cc1a37e84d19f60653231abbb0d35001b60a79a3
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=hill+country+middle+school+in+austin+tx In PDF document text
    • https://niwanokanu.weebly.com/uploads/1/3/4/5/134592400/tasasinir.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/pujajes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409256/normal_5f97f15cdb814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5f92288d909af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f8c16631ee19.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/wujapu/alphabet_printables_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/quikrete_sand_topping_mix_for_shower_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/for_share_app.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/at_t_international_day_pass_countries.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_off00005965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5965 5312 bytes
SHA-256: aa1a1b1aef3410ac333b9e7bb7cfc13e1f12067cc9c40380578ff83153a56791
font_01_sfnt_off00006b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4C 11172 bytes
SHA-256: 99af2337385c3a8c4cdcbe5c3d88a05c5b32f2c2b1e30e3000a5e5f390a7e2a3