Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c26edbcbd683cf9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 07:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a61dac183c89835e6e2c508f47f9ff2 SHA-1: 157841102cfa8e6776d79a194535613aa3c78231 SHA-256: 4c26edbcbd683cf9bc9bd5a38c47dbc85aa9cd120781b52b6da0870c9d6ead71
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL identified is 'https://ttraff.ru/wb?keyword=february%202019%20current%20affairs%20pdf%20adda247', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or traffic. No scripts were extracted from this sample.

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/wb?keyword=february%202019%20current%20affairs%20pdf%20adda247
    • http://files.hidayatashila.com/uploads/1/3/1/3/131379085/4780627.pdf
    • http://files.mayusilkart.org/uploads/1/3/1/4/131411474/kotereruvoda-dumob-gepof.pdf
    • http://files.hannahcurrantshiatsu.org/uploads/1/3/0/7/130775309/3714372.pdf
    • http://nogabuk.jenniferframpton.com/uploads/1/3/1/3/131384401/1e8d2d2.pdf
    • http://files.dank-erie.org/uploads/1/3/1/4/131406321/misujovubeparaxub.pdf
    • https://cdn.shopify.com/s/files/1/0437/2132/6742/files/travi_scott_rodeo_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/1063758531.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/fitakidobizamiwirumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/hampton_bay_landscape_lighting.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/offline_mode_steam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/28508027451.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/sawexegugubalotor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/kezukaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/72926513959.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/81804871060.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_off00006067.bin
8a159b7d40704f072c28c289486367784b021e5635b66ce7c7f436838f25a5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5964 bytes
font_01_sfnt_off000074d9.bin
794e0d4549335dd1b00e0cc087dd8720528b2f2d22403eeca2bf35c616016693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 10012 bytes

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