Malicious PDF — malware analysis report

Static analysis result for SHA-256 7593de6e572d3d6f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-31 08:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25528587950ad28569add1885dff917c SHA-1: a1a85a628157a096a427709be67ad94932810ba5 SHA-256: 7593de6e572d3d6f861a2d8f9d16bd8d1a1a75bc8289cf63d51b6a8eee07ca53
194 Risk Score

Malware Insights

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

The PDF contains a lure for 'Aadhar card psd file download' which links to a known malicious redirector. The document body and heuristics indicate a phishing attempt, likely to harvest credentials or abuse MFA. The ML classifier strongly supports maliciousness, and the presence of numerous external links suggests a link farm for SEO poisoning or traffic generation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/wix?keyword=aadhar+card+psd+file+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1df06a60e2a0448bb8c8dd8cb523d366.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e8dc1c3d41843349c66fd4d5ca0aa5b.pdf
    • https://static.usrfiles.com/ugd/5ad03d_8c2d2794e78f47dc8b4074a194a2a9b0.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/koget.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/31118943298.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/doxinoxaxojapeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/xipamuru.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4330/files/kexafam.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/segmentos_de_la_arteria_carotida_interna.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/98824415791.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_off00005823.bin
3c0e411c5fa0b6870b7e43d441ee4f4015e709da3e73a8bf829ab294569750fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5324 bytes
font_01_sfnt_off00006a48.bin
d37009efbbb201e18ddc99b45727e15ae343593f3333bc4865c9ac13254495c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 10224 bytes