Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1252ad4af1a0c1…

MALICIOUS

PDF

44.5 KB Created: 2020-08-06 09:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e983e983fbcfbe7fcab820d5fad386 SHA-1: 76985915f3c40deee60a83e16c6ede1c0af0ee4e SHA-256: 7c1252ad4af1a0c1c8c8606749f9e885d5b0c796a30a4c2082d28da590e59c7e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to Qigong and breathing exercises, likely a lure. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs supports the attack pattern.

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.cc/pify?keyword=qigong+breathing+exercises+pdf
    • http://files.elyriadev-center.com/uploads/1/3/2/3/132303382/5a0aa.pdf
    • http://files.astrologermaggie.com/uploads/1/3/1/3/131381078/vusen_sewogajax.pdf
    • http://files.eclecticdragonflygifts.com/uploads/1/3/0/7/130739928/silal-vorivutiw-mawodipa.pdf
    • http://files.brunosdetailing.com/uploads/1/3/1/0/131070846/569da92fc1016d.pdf
    • http://files.waterdowncivics.org/uploads/1/3/1/4/131437308/sunokegidakakuk_dokaratonogaku_satujet_nosoxutejubevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3759/6575/files/gta_5_dns_code_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/lobibomisadol.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/vodavi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/severo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7156/1116/files/46452142111.pdf
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/administracion_de_recursos_humanos_idalberto_chiavenato_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/59771881901.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_off00006fba.bin
e90e291dd29bf36ab05c37fa495cf71fca97f502edcc7c7e6428a14bdaad1ee7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBA 5652 bytes
font_01_sfnt_off000082f6.bin
6580cd205ee6c621376231419e22d56bd199c927ce817dd49649f7bbf3bf0d87
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 10024 bytes