Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59a2e01e74233d2…

MALICIOUS

PDF

67.1 KB Created: 2020-08-31 02:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef6b4f7415cfe324370c9d5b22b42ad SHA-1: 0d2693cd64bb16115b578e59a57153d018bca755 SHA-256: c59a2e01e74233d257a8411caf1ef87bff5e0efbf685b0782a5107bf43ba2cd9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as an error message for 'Apache Cordova android target not installed'. This lure is intended to trick the user into clicking the link, which leads to a known malicious redirector. The document also functions as a link farm, directing users to numerous other PDFs, likely to obscure the malicious intent and spread traffic. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to solicit sensitive information.

Heuristics 4

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.me/wix?keyword=apache+cordova+android+target+not+installed
    • https://static.usrfiles.com/ugd/b8c837_288c2e9930604770a27787e45e837368.pdf
    • https://static.usrfiles.com/ugd/0e2875_45ef05ef735e445c8a96c484a001f464.pdf
    • https://static.usrfiles.com/ugd/906e9f_0f38de1e8ee14a3191f91dc58763bd08.pdf
    • https://static.usrfiles.com/ugd/b8c837_d17a12ab3c924693bdab35d794cb1d11.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/16538843024.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/41434309820.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5396/files/sindrome_absorcion_intestinal_deficiente.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/metabolic_syndrome_and_related_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/xezamakasanune.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/funidoroluvu.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/b._com_sem_1_books_gujarat_university.pdf
    • https://static.usrfiles.com/ugd/7baf93_6f4eb9265441497d97f3d7809ed33b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_d61ba79a6a1a48f8bd1b5ee58c55047a.pdf
    • https://static.usrfiles.com/ugd/0511f5_3de1622451b14313a29d5a133e984ee9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7a21397ea224b41b6b4d85f85b12da0.pdf
    • https://static.usrfiles.com/ugd/ae059d_869f4648bd2749df900a5616c283edd9.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_off0000bb11.bin
794fb994e02ada981b46783f7f46505fd2a7b30cbd592dbba535f31782f139d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB11 5384 bytes
font_01_sfnt_off0000cd5c.bin
430b0bf9d6b6aa5dbe485b9c4e546f4573183c4311837c408d66d9d1577e385c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 15828 bytes