Malicious PDF — malware analysis report

Static analysis result for SHA-256 a879a19f30c86e9a…

MALICIOUS

PDF

34.4 KB Created: 2020-08-25 23:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028e097854c5216c22f30e4b13dc0b5c SHA-1: f9a389c89995c65d12a4ee22869ccb3291171a68 SHA-256: a879a19f30c86e9a3dbb1094440f76fff0640897686ab1e777dac5d81df58a14
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent, likely to lure users to compromised or malicious websites.

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=st+john+the+baptist+westport+ma
    • http://besag.asiacontentmarketing.net/uploads/1/3/1/4/131437064/zasetifosefiliw-sujizogifabisa-lefuxot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1874/0134/files/xuzawinukugaxiribawibedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/68604596620.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/92888033041.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/aw_rp50_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3791/files/64166596406.pdf
    • https://cdn.shopify.com/s/files/1/0429/7519/9391/files/51457170881.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/milodisununefolajo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/58514587276.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_off00004805.bin
2e99273bd06ac4fb44401aa404c5c8aaf7cb056b6083294450b97fb612677802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4805 5436 bytes
font_01_sfnt_off00005a5b.bin
f73918b6e1eaa0d3963bb5639f4e38bc4024aff502b7cc63da0c761db6f98c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5B 10216 bytes

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