Malicious PDF — malware analysis report

Static analysis result for SHA-256 d877fd7140bdc307…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 02:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cb67f41589fca1e2266fbe65936b67 SHA-1: 20138ec0066ca8c5356fb695089d38bb2e3423e7 SHA-256: d877fd7140bdc3075b1dc31a96d9f559086f079e4c27fd13eb358eb9be4e07ff
120 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, which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL, 'https://ttraff.cc/pify?keyword=bohemian+rhapsody+piano+sheet+music+free', is likely intended to redirect users to a malicious site under the guise of providing free piano sheet music.

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.cc/pify?keyword=bohemian+rhapsody+piano+sheet+music+free
    • http://xafoxij.trivalleymediation.com/uploads/1/3/1/6/131606289/5121143.pdf
    • http://weredida.twoopenhearts.com/uploads/1/3/1/4/131438114/cabebcd0dbc25e6.pdf
    • http://files.150200martingale.com/uploads/1/3/1/4/131453250/5488731.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/kigirarosirakibagedeguwir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6310/5953/files/nusivuvusewilax.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/dejowuriwusawume.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/java_programming_language_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/63838288742.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/zuboligozodol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/98452259704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/6523454500.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_off000061c4.bin
9ebf8d2802f4e05b610928e0d80112862e3f39d00c460741d6b19c5db46dc699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 5516 bytes
font_01_sfnt_off0000745e.bin
62041b44d5e4d28f9c0684a795a387559bcfd0b5c704d0c31baa953b25b5adcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 10460 bytes

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