Malicious PDF — malware analysis report

Static analysis result for SHA-256 780fc4e13e3c9c4c…

MALICIOUS

PDF

52.1 KB Created: 2020-07-21 16:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64f69b890e79e971fd81248e7303c693 SHA-1: c8c78d0d8dc883bdb1253a7b017d9e984143e17a SHA-256: 780fc4e13e3c9c4c78ea5268bf39bcf14da43cedf21fb7e1cc5c97263518914d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain text related to 'CLSI guidelines for antimicrobial susceptibility testing 2018 pdf', likely serving as a lure. The primary malicious URL is 'https://ttraff.ru/pify?keyword=clsi+guidelines+for+antimicrobial+susceptibility+testing+2018+pdf', which is designed to redirect users to further malicious content. The file also contains numerous other links to Shopify domains, likely part of a link farm to improve SEO for malicious content.

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=clsi+guidelines+for+antimicrobial+susceptibility+testing+2018+pdf
    • http://files.darlingtonlecture.org.uk/uploads/1/3/1/4/131453213/pamarefizo.pdf
    • http://files.buildprinting.com/uploads/1/3/2/7/132712234/zezaj-nusesisuji.pdf
    • http://files.midnightriderbrts.org/uploads/1/3/1/4/131453494/fononetif-gokuf-wizoleja.pdf
    • http://files.pcdaa.ca/uploads/1/3/1/0/131071082/7147832.pdf
    • http://files.alessandrofanucchi.com/uploads/1/3/1/3/131379815/1523b69873b9d.pdf
    • http://files.midnightriderbrts.org/uploads/1/3/1/4/1314534
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/57186547486.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/roredipapumufigoken.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/ruxagajowek.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/novovarikak.pdf
    • https://safuvukilidu.files.wordpress.com/2020/07/xulelomasizemalopujasema.pdf
    • https://zuxefeja.files.wordpress.com/2020/06/xejoxav.pdf
    • https://fufofedubi.files.wordpress.com/2020/07/27120911144.pdf
    • https://rogezomul.files.wordpress.com/2020/06/jujibujafakafakefop.pdf
    • https://zivudubu.files.wordpress.com/2020/06/84022799061.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/kikisagataxedik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/41045265103.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/24272195111.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/lelupokir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/94308917667.pdf
    • https://cdn.shopify.com/s/files/1/0432/9563/7659/files/7295213080.pdf
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/96630820581.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_off000084be.bin
69598dc65c4eafa7ab69283a76196e23f8e4c98cc0db02e9fbaf230982796074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BE 6140 bytes
font_01_sfnt_off00009994.bin
7a2601f4238bb1b9dab982dc1d8fb9a9047229c776ee47f6bed1cf3310827cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9994 12444 bytes

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