Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff0dda9d3d0f66c…

MALICIOUS

PDF

36.8 KB Created: 2020-09-04 20:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdca9f38231de94b5af22ac65765f512 SHA-1: 9e09f6adb83a5e0a9cdbb1155d81b7a107308112 SHA-256: 6ff0dda9d3d0f66c000c57ab2b7b4d00c53cbfb7a6d662ae1868f470338b2403
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=entra+en+mi+vida+piano+sheet+music', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a link farm or redirection attempt.

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.link/wix?keyword=entra+en+mi+vida+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_41ca20bdd69f449092973dcd8338800b.pdf
    • https://static.usrfiles.com/ugd/aff7ca_7a45d32ecf2f4d40a4ca43eb5bb92a8e.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_abce58e9eeb042dabe3e0e880ec53375.pdf
    • https://static.usrfiles.com/ugd/451461_8aa8007662634addb1a0c72fd7569373.pdf
    • https://static.usrfiles.com/ugd/e9cba9_540bd1bd7e0a45bf8e4883eb3277e919.pdf
    • https://static.usrfiles.com/ugd/622218_34467526e8cd4851953283ecea37686c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fd49c83dee04e82a9ad8695ef5cdc45.pdf
    • https://static.usrfiles.com/ugd/3225da_e454c6d3815441f4b24bf675ffeb36f8.pdf
    • https://static.usrfiles.com/ugd/41f880_8676733e8ce44e3b884e6dd4e35300ba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/11353054333.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/59551381181.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/infrared_thermography_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/21961316821.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_off000050a0.bin
cbe1b87a7b713a0778ce9291d3989ecf1774c1fd120ee4a5b7162d52d5076b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x50A0 5296 bytes
font_01_sfnt_off00006284.bin
e605aad7da56f18f75b83513d4048eb7ff1fedc636f9774b661837139e69786c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6284 10592 bytes