Malicious PDF — malware analysis report

Static analysis result for SHA-256 970bfb2f17fe28b3…

MALICIOUS

PDF

41.7 KB Created: 2020-08-25 07:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9763b1a7ea082bcc19ca1c037ed284ff SHA-1: c68b05dd2426b6489687a661bf74f863269ca5d5 SHA-256: 970bfb2f17fe28b394e9bc253032700ea9e5c8a0101b2bf1414fcbf941bfd07b
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=antibiotic+prophylaxis+for+infective+endocarditis+guidelines'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into visiting a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, but one suspicious URL 'http://tizapa.dcmspantherpride.org/uploads/1/3/2/6/132681337/sulor_bitifak_notexemijivuwab.pdf' was also found.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=antibiotic+prophylaxis+for+infective+endocarditis+guidelines
    • http://tizapa.dcmspantherpride.org/uploads/1/3/2/6/132681337/sulor_bitifak_notexemijivuwab.pdf
    • https://cdn.shopify.com/s/files/1/0459/9798/1855/files/ninabonune.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/75735950320.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/45064878468.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/31707163538.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/77607899282.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/kasuratatuzujus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/71640684802.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/synthesis_of_acetanilide_from_aniline.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/28239569357.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/zakufasabogovalelisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/45045139585.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/32739949704.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_off0000641f.bin
c4b070ae5fe0a15049c3a297cc7d0671ba13b17d68b6324e40ef5caf212fa394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 5776 bytes
font_01_sfnt_off000077bc.bin
c56bb2809e110a1ccaede7f0b6efd32f27f55dd739053819f09e235dd7798efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 9828 bytes

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