Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bdddd7ce1b4851…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 22:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95166ddaa8be21560a81a8be2e37fc1f SHA-1: c0a642ecdb23880d141f558e458ffa6f67c6ce5b SHA-256: e0bdddd7ce1b48512ae32bd927a2d16f5f1ef616ca73d5daac4dac6fc1c45810
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 of which point to a link farm designed to mimic search engine results. One prominent URL, 'https://ttraff.ru/pify?keyword=cello+quartet+sheet+music+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure under the guise of providing 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.ru/pify?keyword=cello+quartet+sheet+music+pdf
    • http://files.mollyjonescello.com/uploads/1/3/1/8/131856290/nojorelad-fososezemapina-zirijibavu.pdf
    • http://files.candgsales.com/uploads/1/3/0/7/130775245/podigusevuzukimat.pdf
    • http://tazivox.yashbangera.com/uploads/1/3/1/6/131637649/pafasipifufola_zivuziben.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/rodinesolek.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/56229159200.pdf
    • https://cdn.shopify.com/s/files/1/0449/4170/5384/files/architecture_diagram_of_8051.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/general_aptitude_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/tevaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5954/3192/files/ejercicios_de_nmeros_primos_y_compuestos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/45345099277.pdf
    • https://cdn.shopify.com/s/files/1/0435/6522/0003/files/4591363953.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/97767294491.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/quantum_state_tomography.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_off00006231.bin
978aad405ba0b27b777138d40cedcfbc115ba38a747ed474cd0d3ed13f2811b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 5428 bytes
font_01_sfnt_off00007477.bin
732414a29ba34a5cf153b6ad6b2c5770f3aac1ebd146ac2eee8e12e750294b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 10108 bytes

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