Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43afc999daa1708…

MALICIOUS

PDF

36.0 KB Created: 2020-10-04 15:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 03607485bbdd3b17f610d14ba28cb9a5 SHA-1: 308a3177328e8018ad01bfb0e7008c4754c3856c SHA-256: f43afc999daa1708664489082c1e64b0540ec086a7a9e3d1430ce201032b72d8
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'ttraff.me'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL embedded within the document strongly suggests an attempt to lure the user to a harmful site, likely for phishing or to download further malicious content.

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.me/pify?keyword=shuumatsu+no+valkyrie+raw In PDF document text
    • https://site-1039283.mozfiles.com/files/1039283/tudosafi.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/redoxokaguwu.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/54783717027.pdfIn PDF document text
    • http://fetup.lordsburg.com/uploads/1/3/1/4/131406352/3af03689.pdfIn PDF document text
    • http://files.newparkclosefrc.com/uploads/1/3/2/6/132695329/9498686.pdfIn PDF document text
    • http://femud.shimmerwalls.com/uploads/1/3/1/4/131438265/nufofidanulonatonar.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/1/0433/8978/0124/files/lord_of_the_flies_chapter_7_summary_short.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5152/0678/files/3ds_circle_pad_pro_cpp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9509/files/jozusobix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/39949075820.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4293 2996 bytes
SHA-256: c0be5b06af2ce266da8df1c28a0d6a1a0fb29ca674af96f6c236b79686c9e93c
font_01_sfnt_off00004d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D48 5348 bytes
SHA-256: fd6c80009f9638d30b21b3f3b9406d28140c0762f711bd5fc3a3397e77bdd18d
font_02_sfnt_off00005f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5A 10204 bytes
SHA-256: 81e8507a9a416109e2e8d466c0b662e0e453c3b93345da46de0755cb9f9d681c