Malicious PDF — malware analysis report

Static analysis result for SHA-256 e935b4a764202e61…

MALICIOUS

PDF

75.3 KB Created: 2020-08-02 12:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac38ee4c6ec899906cdf8668a1a577b1 SHA-1: f1c79ad3cedd130e0c13dfa6959fa7a0f19bce97 SHA-256: e935b4a764202e61b921ad788973e3b08b6d2e8eb7dd7420105728e1b564afc0
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=twilight+saga+pdf'. This URL is presented to the user as a download for 'Twilight saga pdf'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=twilight+saga+pdf
    • http://files.comanchemethodist.com/uploads/1/3/0/7/130776594/8867026.pdf
    • http://files.cementpros.ca/uploads/1/3/0/8/130813988/1835f.pdf
    • http://files.noodleshopdesign.com/uploads/1/3/1/4/131406258/jaxifu-misulimoke.pdf
    • http://files.teamhmac.com/uploads/1/3/0/7/130740375/0ff4221.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0432/1801/0274/files/panopobo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/12519663378.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/supagisivewifo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/sopilakosedozokujaxufise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/miragifus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/34939746718.pdf
    • https://cdn.shopify.com/s/files/1/0433/3453/3275/files/58407775790.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zebegevuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/tegepowilobezef.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_off0000e8f3.bin
3371050e9a4109051e59a9ea5a8c37d8a51da9737f3900a63db7f93e4f033de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 5248 bytes
font_01_sfnt_off0000fae6.bin
50b94194504c3a8a2824b3b09d248881a8d9d2e6d0906f0fd707a689230488e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 11072 bytes

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