Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a49c6ff2a6ce22c…

MALICIOUS

PDF

48.8 KB Created: 2020-08-07 00:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1adfb04d250454dad37bbbc91d92950 SHA-1: e84d0b1852284f61bc671759e18cc1ed5b61fe89 SHA-256: 4a49c6ff2a6ce22cb5eb916070c356e830e55448e5556d92284b54e72f2858e4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=afman+24+204+july+2020+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF.

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=afman+24+204+july+2020+pdf
    • http://files.meiageddes.com/uploads/1/3/1/4/131437878/segugopumok.pdf
    • http://files.desmoinesmennonite.org/uploads/1/3/1/8/131857445/bupex-wajadano-jidituminom-lapuzowevor.pdf
    • http://files.dcmea.com/uploads/1/3/1/8/131872298/dezeka.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4843/files/70809340054.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/project_monitoring_and_evaluation_framework.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/fogukow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2376/files/52341027410.pdf
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/12153152750.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/xikiwasuwurejegusapiraxof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/64417653995.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/mufuvafuraxo.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_off00007e63.bin
d4566b01fb4712bb91868294a4563f4a04a9d287693dc276ba5ec88d154af339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E63 5440 bytes
font_01_sfnt_off000090f4.bin
1f6b50d8a8b21b7dfb78c0b07160bf96e93789dbf0e07d8eb92d0052ab973a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F4 11044 bytes

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