Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a97d029f0ea87c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 21:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5af0cbcebd22aff682f3906b95e92e3 SHA-1: 983c7f2f681489c0552c93df8b97f11ca27409d5 SHA-256: 98a97d029f0ea87ccc31ecab44120ad817b048b03ff1d691dcb5ff714e21fe6e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Avid s6l 24c pdf' and the malicious URL 'https://ttraff.com/pify?keyword=avid+s6l+24c+pdf'. This suggests the PDF is designed to trick users into visiting the redirector, likely leading to further malicious content or downloads.

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.com/pify?keyword=avid+s6l+24c+pdf
    • http://files.islandparkvillagefl.com/uploads/1/3/1/1/131164011/xiwonezesudumajazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/giduxizeretewezedogesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/4667839719.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/da_form_1594_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/mixumunogasuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4195/6775/files/kokulalarogekus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/31448966115.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/72385627085.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/catch_22_francais.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1707/files/20690620545.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_off00007204.bin
caf3c852f3a149f8d29b4446c43c40e2f05b4a4bc216801e2cff248d7407ff73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7204 5268 bytes
font_01_sfnt_off00008412.bin
fade4a921b41feb0c4ead39a2732fb6bf5c6c6e39eb55108def12b7c1e02f37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8412 10620 bytes

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