Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9e2ec987f79786…

MALICIOUS

PDF

32.8 KB Created: 2020-08-29 01:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d88101a27f9b2277459e0ddfe60eae2d SHA-1: 186129f64d83baa1ed187ac49f44cf7afa667790 SHA-256: 6f9e2ec987f79786945554568d9b46aa67169256953421e5214ec75e5db4455f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a URL designed to trick users into downloading content. The document body, though heavily obfuscated, contains references to 'pokemon soulsilver download zip' and the malicious URL, suggesting a lure for potentially unwanted software. The presence of numerous external links, many of which are benign, indicates a link farm strategy to obscure the malicious redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pokemon+soulsilver+download+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_93879a5317f44462a68c02a82ce7a5da.pdf
    • https://static.usrfiles.com/ugd/b8c837_f989ac2ba76d4abba6e204ea626b5b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_898770e7ec754087a8c955dc77b1dd1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_136f5b22e5ed455f9f3d9a3404f5ebc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee0a549f8692443f815821bb22e3288c.pdf
    • https://static.usrfiles.com/ugd/b8c837_878ff843bf164f8ea95cb9039d221256.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b1e7c6323bf4b9a92f753438ff76aec.pdf
    • https://static.usrfiles.com/ugd/b8c837_2416ac1a9c6341dfa49e44188597864c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8649b4894614051aeb2fadee47746f0.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/pujusamid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/sosopubozujuvarazaxikowen.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_off0000443b.bin
97a60eb292eb983e6a40ac96b9f525bd22a777f864ea8e5f5305f765993f2214
pdf-font-stream PDF embedded font (sfnt) at offset 0x443B 5372 bytes
font_01_sfnt_off00005682.bin
5450fb17908165a870000fffb24eabe5a7033f2a430cf8b2e34244b30a2f566b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5682 9320 bytes