Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a658b6a27242f0…

MALICIOUS

PDF

43.9 KB Created: 2020-09-01 10:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 259c8f3c50458df5f5eb72048139a374 SHA-1: 8163793bf475629ca44cf9ee22140487e0513745 SHA-256: 78a658b6a27242f0382354a2eed3b7502752aa95c12435f4749cbdc302538cc5
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.com/wix?keyword=floor+plan+template+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to floor plans and URLs, suggesting a lure to a malicious site.

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.com/wix?keyword=floor+plan+template+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_396629ec99d94ffd808ba9b983161948.pdf
    • https://static.usrfiles.com/ugd/b88e3d_de293a727bdb4acfb5fa06ba1dfc1964.pdf
    • https://static.usrfiles.com/ugd/5360f8_fddc006416b4460f8c75e62c931eadd1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4035/files/24289144511.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/vipivolukediluwulas.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/tepelunojesibelixab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/diveworiwobemekiren.pdf
    • https://static.usrfiles.com/ugd/8ba634_0a50e10461784dedacd4db7e5a9abd7f.pdf
    • https://static.usrfiles.com/ugd/8ab72e_e61d14f4fd894ca5a85763865c3bb8b8.pdf
    • https://static.usrfiles.com/ugd/865d50_0604d20c34ae4df49d525ed993789c2d.pdf
    • https://cdn.shopify.com/s/files/1/0434/6770/2432/files/dating_game_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/nozatenag.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_off00006fe0.bin
a1bfc7c817b3615a9626fafe54ba60e91fa4c9f95b67aa7792d2a0acc80db4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 4964 bytes
font_01_sfnt_off000080af.bin
a8fcc89d4472ae05d66234b311db3ea12e9fc922c208f6052a159a6eab7b4256
pdf-font-stream PDF embedded font (sfnt) at offset 0x80AF 10472 bytes