Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ee7c4a2e3ddc6e…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 11:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48afc00dd63d569356abcf3fbed24276 SHA-1: e3615d557556c5b78f657a1110eea32f86d1f434 SHA-256: 52ee7c4a2e3ddc6ed2a5db3305de187ea8a6993b910d8a35928fae4a9ef626cb
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/wb?keyword=free%20intermediate%20piano%20sheet%20music%20pdf`. This suggests the document is designed to redirect users to malicious sites, potentially for SEO manipulation or further malware delivery. 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=free%20intermediate%20piano%20sheet%20music%20pdf
    • http://files.airlandandsee.com/uploads/1/3/1/3/131380163/4104883.pdf
    • http://ramire.brianwhettenart.com/uploads/1/3/1/6/131607029/d972630229edd.pdf
    • http://files.meredithodekirkabroad.com/uploads/1/3/0/7/130775934/nedog_bevipalunureb.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/35470334101.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/fantage_online_generator.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/66879304718.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7308/files/11852736052.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/5144388508.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/92758092796.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2015/files/3287452479.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/76154461142.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/waller_isd_taxes_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/65645858707.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/tigivupekunimigenozijemej.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_off00007885.bin
354ad99e60b8c05da11a8dbd0f91dc76eb4f6d589eb20e4e907814288779964c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7885 5316 bytes
font_01_sfnt_off00008a6f.bin
4118513bfd4ca79fc5a03b54506cf322daf03652a3accb792cd2f6ae4f582af4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6F 16680 bytes

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