Malicious PDF — malware analysis report

Static analysis result for SHA-256 7882302e11423e09…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 15:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e53b74e71c526ce439550923ba256c SHA-1: 66cf904570d7620fd4229b325be00967debf45d9 SHA-256: 7882302e11423e09323d25215c75eac6a2397aa70f2efa546102f2c4fb908dbf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, with one specifically pointing to a known malicious redirector. The document body, though malformed, contains text related to 'SAP note 1804812', suggesting a lure to trick users into visiting malicious sites. The ML classifier also strongly indicated maliciousness.

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=sap+note+1804812
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e8506d_d4d07bc7f8704e8082a1a84efccd4d03.pdf
    • https://static.usrfiles.com/ugd/b8c837_49e62822bb86404787bba61d8a9d2eb8.pdf
    • https://static.usrfiles.com/ugd/19103d_580a0b9f6bb44f619ce7c6fbee69eb44.pdf
    • https://static.usrfiles.com/ugd/b8c837_51bddcf388c84e22a194f1c8fe00d4a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3336346775d04b2ab1b45fb6a047ebf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b3bb0f3cad4295b1765cfc68d715ef.pdf
    • https://static.usrfiles.com/ugd/dd4472_6ed147ef84a949e28e33aa59224a9d97.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f66f03741b147d385a27749e24f2d19.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_7f09789c33ac422084e07619cb890664.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e0065230e734c89bf394a82127e6c96.pdf
    • https://static.usrfiles.com/ugd/b8c837_627bd5e6270a411586a7054f928fac01.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef2e4b5eed7943a1b64542a5945b9da3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c91d1cdd20489fab72408da3a639f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9acc0b0a0f4400c95413b4d3c671cf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_23a055ba82364faa9aee6e7df11a00e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_43e3d64818224ac5b1e3f2e38b3bbd34.pdf
    • https://static.usrfiles.com/ugd/253000_4c866f400ba14941aeadad40a3b76397.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_off00006627.bin
9ab9d87e98527cfe92ed42af65155a4389d44671645a3bf55c3ba4e9e7cabd8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 5216 bytes
font_01_sfnt_off000077ff.bin
a1f3a21799e99504ba1b5b61e26a2bf9ee840805cb0b78d9306160c7ff9266bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x77FF 10348 bytes