Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a8bb27d6c10895…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 10:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473f15ab79753052d94cb4a9a6cdd08f SHA-1: c1eca35a78b672754812d03b13daacc02e2c3f75 SHA-256: 99a8bb27d6c1089519b332731dfb05794e22752d1be96bbe7631f64d8d732dd4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=annual+general+meeting+template+singapore, which is the primary indicator of malicious intent. The presence of numerous other PDF links, flagged by PDF_SEO_LINK_FARM, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

Heuristics 3

  • 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.
  • 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=annual+general+meeting+template+singapore
    • https://static.usrfiles.com/ugd/b47706_3086e7991292479097010799cfc5bd2c.pdf
    • https://static.usrfiles.com/ugd/469aea_e1117a4600f34cb4800bd550ed9b405a.pdf
    • https://static.usrfiles.com/ugd/738632_a74824e8dbfa4820a020c6f2e6c4f29c.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/agnisakshi_serial_song_video.pdf
    • https://static.usrfiles.com/ugd/33a16d_f05c3a5d805244eeb1d317013512c925.pdf
    • https://static.usrfiles.com/ugd/225520_20e862bee1b54800be58af987f708b3d.pdf
    • https://static.usrfiles.com/ugd/97aff7_3bacce18a2e94fc8a43d65d6773126df.pdf
    • https://static.usrfiles.com/ugd/0d002d_4866f2a6cc354cd08e73b792181c0881.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2d78954d1b544bbb29fc033fcae028f.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/78111874730.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/carrelage_hexagonal_grand_format.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644a.bin
bab1f4a2e5365d19014bc697ba841134df57df1f35eb4276bad5ceff5733e3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 5128 bytes
font_01_sfnt_off0000759b.bin
8e2442c9fed97566346d91633be4efeba745b5010627469db5286b73f28a8f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 10716 bytes

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