Malicious PDF — malware analysis report

Static analysis result for SHA-256 9684418e2d7a0f8f…

MALICIOUS

PDF

35.8 KB Created: 2020-08-20 03:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73a5281795a971fe5ad74962a0d01aaf SHA-1: cc55001f2767739ce578430fd56e8f077c23d0a5 SHA-256: 9684418e2d7a0f8fe52c384d7a4213ebb93e0fa70ee3e42796c6ed46d2c56fc3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily corrupted, contains text that appears to be a lure for sheet music, and the malicious URL is directly related to this theme. The primary malicious URL, 'https://ttraff.cc/pify?keyword=hindemith+oboe+sonata+sheet+music', is a critical finding, indicating a redirection to potentially harmful content. The presence of a link farm further supports the malicious intent.

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=hindemith+oboe+sonata+sheet+music
    • http://xagawo.lexingtonal-anon.org/uploads/1/3/0/7/130740450/1548690.pdf
    • http://files.ryanchiropracticclinic.com/uploads/1/3/1/6/131606343/zubogitefososotojiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/modal_verbs_probability_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/usps_customs_forms.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/59124320991.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/wiczenia_angielski_dla_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/zisejuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/toefl_ibt_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/40366538084.pdf
    • https://cdn.shopify.com/s/files/1/0435/0142/0696/files/14046650868.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2981/files/66410160539.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/83364451137.pdf
    • https://cdn.shopify.com/s/files/1/0435/3166/5562/files/16187492140.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/fikobevitoligana.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_off00004d37.bin
c3c5b6ef783e744b21f852219ebacd87c5f1200adac611e26a67a2a3e6ddc464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D37 5152 bytes
font_01_sfnt_off00005e84.bin
77336b5d63bd782c9bca0934933b9790972a11d7b8f11c07cde68ed0c6ff7f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 10480 bytes

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