Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b5b38eca2804a8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-29 06:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68a10f3dc9c4e748f1b1c977f7e844e SHA-1: abb1c027eb59e36ad6b3dff000b82e14c8658469 SHA-256: 69b5b38eca2804a827edbd669c4e11d6cf70fb55956a6494c48ca86136a9fa6b
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The primary malicious link, 'https://ttraff.com/wix?keyword=abreviatura+de+telesecundaria', is designed to lead users to potentially harmful content. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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/wix?keyword=abreviatura+de+telesecundaria
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_36015bfecebd4de887802a544476f7cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_a153936927df48dbbdf7ad9dd26bfb88.pdf
    • https://static.usrfiles.com/ugd/b8c837_beaf0f4ae0944100b8047c300d0beb16.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/aadukalam_songs_kuttyweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2952/files/25174019202.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/secreto_biblia_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/fuzifodoneruzaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/john_deere_185_hydro.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/66072424777.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/cbse_class_9_science_syllabus_2020_18.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061da.bin
3a7a057c0d9cd631bb10a94b510c673979dcbf37fbdb9a7d8e5aadea979575b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 5124 bytes
font_01_sfnt_off0000734b.bin
c138fd6594f341904d0a31267155675d30b2dd39da737a6c2d3eb70a6f02a164
pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 11372 bytes
font_02_sfnt_off00009891.bin
47bc69c673d07cf3585643e4747a4a63761d86e95c10353a5b0b1bfe0edeba3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9891 16236 bytes