Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b15a576af1e5384…

MALICIOUS

PDF

53.9 KB Created: 2020-08-31 00:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdfb8a496909e6ac220a71d46453df22 SHA-1: 2ce3c68d2bc5fad430057b1a5bff2b0ff1d3fcc5 SHA-256: 5b15a576af1e5384fba35dde7c3f6750465ee93e0c7f00989e97736a73691401
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=can+spells+crit+pathfinder'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links. The embedded document body, though heavily obfuscated, contains the same malicious URL, suggesting the document's primary purpose is to redirect users to this malicious site, likely as a phishing or malware distribution lure.

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.club/wix?keyword=can+spells+crit+pathfinder
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/74e905_cd68eeb6ca184404b09112f540f4a3c6.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_ca43da8c73d2466a8b1c4fa4dccff67a.pdf
    • https://static.usrfiles.com/ugd/9904c2_3f8a888577694ec08fb64a20c52b83a8.pdf
    • https://static.usrfiles.com/ugd/b9801a_85c5d2c413594a5790cd53e441df2140.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6887/files/10197702524.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/52807754263.pdf
    • https://cdn.shopify.com/s/files/1/0431/9716/9824/files/maboranazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/the_wendigo_by_algernon_blackwood.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/68473695796.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/8400451635.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/9947829292.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/59869137138.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_off0000942c.bin
48206b7368e923a50342d10bc42c3a732bfdf28fa406dcb8bde70f7bb1aff556
pdf-font-stream PDF embedded font (sfnt) at offset 0x942C 5148 bytes
font_01_sfnt_off0000a5a6.bin
527d0a7f0ca43d51b99a531e7a07d2cbc37889be8f57f01e039fe91385bb0ad5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 10960 bytes