Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce543e4a19218ab3…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 07:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159dc338c97a1cea398a8ae7c565494b SHA-1: cfe53a3fd2be80e38ae878bcb1afcf2537f4f579 SHA-256: ce543e4a19218ab3f6ac5a2d271ecff339ef2af5e121fcefd44372a8f2f81f0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is likely used to funnel victims to a malicious site. The PDF also exhibits characteristics of a link farm, suggesting an attempt to game search engines for visibility. The ML classifier strongly indicates 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.cc/wix?keyword=e-commerce+2015+%252811th+edition%2529+pdf+d
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/75302751406.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/samsung_ml_2525w_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/3917/5335/files/definition_of_capital_market.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/vanefejuforetud.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/labview_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/18034334562.pdf
    • https://cdn.shopify.com/s/files/1/0429/4901/7756/files/pomimagesebamekosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4432/files/one_republic_apologize_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/45996678024.pdf
    • https://static.usrfiles.com/ugd/b8c837_05f9fd05704643bcb590d79a516f4ca2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0ce30be00e344cbada7ca0ea8cfc5bf.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/
    • https://cdn.shopify.com/s/files/1/0428/8941/276

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007720.bin
dacb9fda3befe9ee5431a2c66cf231f9022b42d06bc6bef2c7120d9f1aada2ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x7720 5568 bytes
font_01_sfnt_off00008a09.bin
ed17b5c57ac8aaf6b9c2046485a8149090c524b9e15247a3515cdea6c76ee24a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 11332 bytes