Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e95fb4329ba93f2…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 13:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62a3cc49739a3f3ab047533a4e76902f SHA-1: f8b9cb4131273307b1ca646fdcd1a0f7f2f64f3c SHA-256: 5e95fb4329ba93f23a30ec18b477bb0d7e1208d23ae3a7d688561cb32560cd75
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which in turn leads to a link farm of other PDFs. The primary malicious URL identified is ttraff.com, which is known for malicious redirection. The document body, though heavily obfuscated, contains text related to Excel and a URL that aligns with the malicious redirector.

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/pify?keyword=copy+sheet+trong+excel+2016
    • http://files.supercoltguitars.com/uploads/1/3/1/4/131438188/teramesiben-bogeninezikiri.pdf
    • http://files.dakotaashleymarie.com/uploads/1/3/1/3/131398244/8850002.pdf
    • http://files.rbowtique.com/uploads/1/3/0/9/130968994/pewozi.pdf
    • http://files.freshrescue.com/uploads/1/3/1/3/131398357/2325814.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/zufogut.pdf
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/livagobazufoxa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/bebigumideginukukofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/formule_pour_calculer_le_poids_ideal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/99929393128.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/kafowijirutizovepazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0430/5145/0519/files/diccionario_psicologia_ingles_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/2827762639.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_off00006a00.bin
aa1992891f4905979ec899eaeb813584d3828b2e3095d0e390adbde70296d945
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A00 5540 bytes
font_01_sfnt_off00007cf3.bin
2a90ec92c60ca823b6b18200df95bbbd8a0d8ae5f3ed649e5233f8cebf4cc5bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 16444 bytes