Malicious PDF — malware analysis report

Static analysis result for SHA-256 7449ec5f7750a6fc…

MALICIOUS

PDF

41.0 KB Created: 2020-09-03 04:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6addd269f6a20da5961b44c71e0d8b3a SHA-1: 16eb5edde6798827737d5c02882cfe7d51a8d99c SHA-256: 7449ec5f7750a6fc3650083a0677bf150ebfcfece754c92dcf602d2606753409
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive link presented as a download for 'Messenger lite black apk 2019'. This link, identified as a malicious redirector, leads to the URL https://ttraff.me/wix?keyword=messenger+lite+black+apk+2019+descargar+gratis. The document also features a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness.

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/wix?keyword=messenger+lite+black+apk+2019+descargar+gratis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a4c1fa_50cf0773e2824cd998ace27ff34d8d72.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f598550e17d4b59a95388f01a911b41.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3529a7718384a91b1ecc048e9274b41.pdf
    • https://static.usrfiles.com/ugd/fbcb80_e1e1c1a3c2284a0abb1f3990149f4e1c.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/vozepaxir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0994/files/bhojpuri_movie_2019_hdvd9.pdf
    • https://cdn.shopify.com/s/files/1/0446/8791/7209/files/filuvewozafirawojudozisuz.pdf
    • https://static.usrfiles.com/ugd/607883_94df1ba599ed48d698f0b46507aaa718.pdf
    • https://static.usrfiles.com/ugd/ca32a8_d1b42ebdbb8b44adb0c759bcfa1ebe7b.pdf
    • https://static.usrfiles.com/ugd/b90ba1_02986690f0a5427a86e64cf4e7488771.pdf
    • https://static.usrfiles.com/ugd/8b49c6_4928087b460e496496ab2ef482310bf6.pdf
    • https://static.usrfiles.com/ugd/3f8d85_cacb596cac954ab3a1bab966b17d5fa5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000580b.bin
3744b85b4fd516f596b6b79b11055ef7c43661095934c8c1c8ae87c8eec403a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 5932 bytes
font_01_sfnt_off00006c51.bin
311d60af392d873667aa874008c7acede377d1d568eea1b0f1ccf56c7792211e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 13820 bytes