Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a48cd6c0aaf53e…

MALICIOUS

PDF

73.8 KB Created: 2020-09-02 07:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f5112ded8aa74a56f638fedf79b742b SHA-1: 3f21b3c4bf7adfe67d10e2a61b196607ff53a7fd SHA-256: 79a48cd6c0aaf53e40c1545813cd1f979e76c0bf756ae4de3f2bbb13ead3834a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=annamalai+university+distance+education+convocation+form'. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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/wix?keyword=annamalai+university+distance+education+convocation+form
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/drop_column_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/vukalobufozuxasevamaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/kokalum.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2491/files/surah_al_mulk_latin_dan_arab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/alguns_centros_de_pesquisa_na_inglaterra_esto_realizando_um_programa_de_triagem_populacional.pdf
    • https://static.usrfiles.com/ugd/b8c837_7defd885b47d499c902e3ab214b45bd3.pdf
    • https://static.usrfiles.com/ugd/46429b_184cc353eb67464293e775287d6c4448.pdf
    • https://static.usrfiles.com/ugd/b8c837_1047222140094212abc2e0fb59586faf.pdf
    • https://static.usrfiles.com/ugd/b8c837_023c3f9e750b484f8a16210357773a9f.pdf
    • https://static.usrfiles.com/ugd/dad90e_95964c06ed6d4d7d84a5eb3f04260a0a.pdf
    • https://static.usrfiles.com/ugd/1f6d71_4162ec2d47684dabb9733b36c76704b5.pdf
    • https://static.usrfiles.com/ugd/9d869b_1ac62102c75b4a62a660282fe4445d8a.pdf
    • https://static.usrfiles.com/ugd/de02f3_82f2365173e24f7c83de6b962405fcf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_06726444992e4d47ac4fef5d33b314e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7056f474405147048f057f18428ca38b.pdf
    • https://static.usrfiles.com/ugd/b8c837_715346d638d14508a09eaaf21faff564.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b7039da0d7347e782c7dc53500da723.pdf
    • https://static.usrfiles.com/ugd/576447_27ec455f57794c4c9fd0e2dfff3f18ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7318f5f86d74ce6b90b071dcefc3fb6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b3.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B3 2828 bytes
font_01_sfnt_off0000e2ad.bin
84cd4e1e275b0b54add2ddb0da3e8b4b3709b70188ec3bc0311d51361596b2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 5320 bytes
font_02_sfnt_off0000f4b7.bin
d6bfcad18fb7260b0f8248828b4bffd2909a807e5e118699b24d18828e3c7fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B7 10572 bytes