Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39ab0fd9d32de21…

MALICIOUS

PDF

49.0 KB Created: 2020-08-31 06:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0f111d821b1b981ad9aebb1341ce949 SHA-1: 9340cf07635a6496da6d50db128a4e43291c7e6a SHA-256: c39ab0fd9d32de212d7cb3887fa87ea905112ef28ffb9bf89139ce52c34a1c9a
168 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking the link, possibly by posing as an invoice. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may also instruct the user to open a password-protected archive, a common tactic to bypass security scans. The primary malicious IOC is the redirector URL.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=filefactory+premium+generator
    • https://static.usrfiles.com/ugd/30e015_3009559f100d44d6999ba6c86a760077.pdf
    • https://static.usrfiles.com/ugd/a86d68_467cb53469c743bcb4f0026b89ccd468.pdf
    • https://static.usrfiles.com/ugd/b8c837_e61034c7b56a497a8765668b0d447c30.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/fibekamobaboredulagefib.pdf
    • https://cdn.shopify.com/s/files/1/0463/6354/1659/files/ermanno_scervino_spring_summer_2014.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/orbit_er.pdf
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/attestation_de_prise_en_charge_financire_d_un_tudiant_majeur.pdf
    • https://static.usrfiles.com/ugd/83d902_ff26f5439a3244fb9a8ae9de62f306f5.pdf
    • https://static.usrfiles.com/ugd/764aaa_6ec23fdb406c4c60ad319bb08a473a09.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_09c967cbfc5745fbb1261af992d7a0b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f7f3190808d45b599d585a6502508f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab8d139f16d40d2aa89387052243d87.pdf
    • https://static.usrfiles.com/ugd/51c472_5e7b58492b3448e1b721bbb7551856e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea8f9bafac8d4216ac3cc7048b98a996.pdf
    • https://static.usrfiles.com/ugd/f09a9d_a7111751517e4beea2163248d1d8a0af.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_off000066f8.bin
11f7ba91fa8d792b71ccc8d103812987da39d1eddf0756d22399db7da87cef4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F8 5212 bytes
font_01_sfnt_off000078af.bin
64782193a7e7a89da57d35051c577aafb51f841c53fcad6278b980f7b4a236d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 11144 bytes
font_02_sfnt_off00009e6f.bin
4cba404c2e615c3ec792742c91a0b03f07f1e4289ddccf419ab8172da777e5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E6F 16940 bytes

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