Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7ba544d3069f4d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 03:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9c5c03901ecc1f7d5c735a3bef2de6 SHA-1: d9eaeea7e38c9065dfad20998053bae1f0ad8a45 SHA-256: 5f7ba544d3069f4d152479b38673657475871f4409ffdf0daff2c51a3bb06d34
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to movie downloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or redirection scheme. The document body itself contains the primary malicious URL and references to other benign-looking PDFs, likely to obscure the malicious intent.

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=descargar+pelicula+la+llamada+mega
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/54755370447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0272/files/jasurefajoboturowaz.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc05465ae0a4ac48cead0826860b0c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_aaea98ca805a4118a92d760239612e5c.pdf
    • https://static.usrfiles.com/ugd/24853a_d78cc2fb14474857b6e825b7b14f848b.pdf
    • https://static.usrfiles.com/ugd/b8c837_175eddbbee2643abaa28acc967ce3714.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef2b933a735040d496d20ab50877c2cd.pdf
    • https://static.usrfiles.com/ugd/b48b60_ebc99bd6355940f992ca73ec98dfc944.pdf
    • https://cdn.shopify.com/s/files/1/0449/1021/5323/files/landslide_information_in.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4935/files/simuludodebuna.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_off00005ad9.bin
31ad0fbd8985dbceb6af4250646b649bd756889588866b0886b8ba542855c5e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD9 5392 bytes
font_01_sfnt_off00006d17.bin
b6ec8ff7b0643c505db156778a9528a68e3aa1a869566c294720112f2c864c27
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 11724 bytes
font_02_sfnt_off0000938e.bin
2d6462c05d9eb19646177445c8935241b4d3deed2851edfb692bd677bb8a9580
pdf-font-stream PDF embedded font (sfnt) at offset 0x938E 16904 bytes