Malicious PDF — malware analysis report

Static analysis result for SHA-256 429bbb16c0cff63f…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 20:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0118bbc8b2041630d1e9ac1ec8098617 SHA-1: 23c32cffe8560c9390a6ce48d94936513e1cd286 SHA-256: 429bbb16c0cff63f1e94fad18df6e94c81f1e641a02a44da9029001aebbed560
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The presence of a 'Password-protected archive handoff' heuristic suggests the intent is to trick the user into downloading an encrypted payload. The document also contains a large number of embedded links, many pointing to Shopify, likely part of a link farm to improve search engine ranking for the malicious lure.

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.
  • 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
  • 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=winrar++mac+os+x+free
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/wijepigarukoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/waxejefixoxixitusesufoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/digitopibadizugid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/dejokowugexezatijufuwex.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/golang_check_if_file_exists.pdf
    • https://static.usrfiles.com/ugd/de60da_89c3ac16c3ed4f29828fec3e51cba487.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a22d6aad4df455fa07ee6a571e12eb8.pdf
    • https://static.usrfiles.com/ugd/40512e_195a5a06d6ec45ee8f5c41cae6ce87e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6710f2552734f3daf9a5c84df48d25f.pdf
    • https://static.usrfiles.com/ugd/d1c05f_da090799811a4a4582ab6860c7fad42b.pdf
    • https://static.usrfiles.com/ugd/cf14a4_b922b59760be4c57b3390c845e9e76a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b045058898184f6b8774cabba4cb35ba.pdf
    • https://static.usrfiles.com/ugd/c1615c_c8ad0934714c45afb54ad40604b51703.pdf
    • https://static.usrfiles.com/ugd/b8c837_a30a53eedc7b4b90a672a8dec0910a51.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/pdf._js_blob_url.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/sewitimuwaguduw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/bagevorusupu.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_off00006818.bin
056f73400a95eb4ef31827dbf228f7f7966dd800144d0ed9b715d9e830836ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6818 5076 bytes
font_01_sfnt_off00007956.bin
f14915f471adf8575b1b2c93c924578d657456d48433972546f6b1baf60d6672
pdf-font-stream PDF embedded font (sfnt) at offset 0x7956 10892 bytes