Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b869b26e63c6115…

MALICIOUS

PDF

38.0 KB Created: 2020-08-12 14:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23fabd15d120de264a03dcc129f19305 SHA-1: 2130561c69c72db30e761b1efcdcc6d63c33b976 SHA-256: 7b869b26e63c6115d9c3183e86715f5240684e6f2a0aa186467b82720589d20b
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Aadhar card application form download' and a URL that appears to be part of a SEO link farm. The presence of MFA lure heuristics suggests an attempt to harvest credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.ru/pify?keyword=aadhar+card+application+form+download+pdf+in+telugu
    • http://zumaza.spencerscustomwood.com/uploads/1/3/1/4/131407067/zepurutol.pdf
    • http://mukudit.gschwindcabinet.com/uploads/1/3/1/3/131378780/5403535.pdf
    • http://files.dhnature.org/uploads/1/3/0/7/130775284/nuwatokuxep-wajafuvabeta-tisemuvage.pdf
    • http://files.megan-snyder.com/uploads/1/3/0/7/130775965/jajubobivelunaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/when_i_am_laid_in_earth_henry_purcell.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/carvedilol_prescribing_information.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/tiwaragukabikoxaxop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/aditivos_alimentarios_colorantes.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/67621244790.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/27854688185.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/91802962033.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/armitron_pro_sport_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/wovododetomar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/88872061673.pdf
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/vobusuvutonelefo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/zogitolopewit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b27.bin
f72bc88bf2dcd40f009aa90e380b5a40b49a90637ffc300acd7b9061fdfa58af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B27 5356 bytes
font_01_sfnt_off00005d36.bin
587eaa52918f6fffc0d626d8c357d42356748f07b220266c5be3de3ca394bbd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D36 9208 bytes
font_02_sfnt_off00007cc1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC1 4324 bytes

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