Malicious PDF — malware analysis report

Static analysis result for SHA-256 4516f7ebfd0d8441…

MALICIOUS

PDF

73.5 KB Created: 2020-07-25 21:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6586a7b9fac25ae2603003f84cfbc452 SHA-1: 255399b6fda002f5dcc0769b960c8059af88b402 SHA-256: 4516f7ebfd0d84410cc52d9e067fc8f367329e3653c59b85ea0cfe93bcdc4878
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but the primary malicious redirector link is to 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious sites. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link farm hypothesis.

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=charlie+chaplin+2+video+song++hdvd9
    • http://files.shellyginterconrad.com/uploads/1/3/1/8/131871621/1910954.pdf
    • http://files.eastafricanscholarsfund.org/uploads/1/3/1/6/131606396/pazun_dumenu.pdf
    • http://files.sciencebeautygal.com/uploads/1/3/0/9/130969982/a78e38.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/93337496199.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/90855985910.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/mezod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/jezilavagasabap.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/jajimasigisijafini.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/38818983258.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/tabig.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/pixajelaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/laxinexuwebojezelo.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_off0000e192.bin
d3651ad108696c88671d99ae43c20d429580c0473cb1bc7423b65f48216015cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 5412 bytes
font_01_sfnt_off0000f3ed.bin
91575721e8552677fccd12a7f164c976a7bab02a50d348ead9c52f20330b3b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 10828 bytes

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