Malicious PDF — malware analysis report

Static analysis result for SHA-256 937a19cfe9c5b95b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-16 15:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 402f92da305dc95bedbe97dc643aa810 SHA-1: bc98b31b623fab66d5ee5bde5e6f1da9c49cb1a9 SHA-256: 937a19cfe9c5b95b348df0531be3a6febf6d41c50db1a7437f9739548bf87988
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including one that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'free advanced christmas piano sheet music' and the malicious URL. This suggests a social engineering lure to trick users into visiting a potentially harmful site.

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=free+advanced+christmas+piano+sheet+music
    • http://files.sushebyjtracey.com/uploads/1/3/1/3/131397938/nubumegoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/18030201327.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/38030242073.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/tejenomiridawopumurifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/dizoxesozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/tirevapuwunufobatofoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/99274275387.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/national_contraception_guidelines_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/afrontamiento_ineficaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6383/files/english_to_assamese_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/kikedudademiso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/fusubomoguxafebojilov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7593/files/kozosepumipefugazapomera.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_off000067ec.bin
0cdeb6cd3609fe311296396c26a3fdcabbf9e970d3cef1328225c725daa23e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 5296 bytes
font_01_sfnt_off000079c0.bin
80cbed299644131af3811018365c8eb76248baadd97b6f57b10999586d82911b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 10068 bytes

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