Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5a0ca02f3fe3b5…

MALICIOUS

PDF

48.4 KB Created: 2020-08-05 06:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424678e7bd2088a494b79962565a9ff8 SHA-1: d034095d2c897af3bae4a4a31af854a22fb40cbb SHA-256: 1c5a0ca02f3fe3b50209f9a9bd95ff9c7ce86e477eeb5b0f31caf7c829e818ef
120 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous embedded URLs, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'ergonomic chair design pdf' and references wkhtmltopdf, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages. The presence of a link farm and a malicious redirector indicates a social engineering attack aimed at driving traffic to malicious sites.

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/pify?keyword=ergonomic+chair+design+pdf
    • http://vagus.uniqueseminars.net/uploads/1/3/1/4/131482976/masibuleganumisu.pdf
    • http://files.piggyssqueakeasy.com/uploads/1/3/1/8/131871627/domowexamujurofenelu.pdf
    • http://xoperuji.bitcoinerpro.com/uploads/1/3/0/8/130874050/7899354.pdf
    • https://cdn.shopify.com/s/files/1/0447/5761/4741/files/acute_pancreatitis_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/bojorulalopag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/20133015116.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/61455718759.pdf
    • https://cdn.shopify.com/s/files/1/0438/8634/6408/files/83607878853.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/81542631621.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/43148063432.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/buwam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/wipebazuvirejevexe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072cb.bin
34f863c814c9ca6e592f840990d50b8435630279a823bc1adaa43f4b3dd4a4a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 5200 bytes
font_01_sfnt_off0000843c.bin
2de3550066c9d0f17444a901c9160b478b0b398959c294340d0850b629f5fe18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843C 10184 bytes
font_02_sfnt_off0000a6cc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CC 4324 bytes

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