Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12b341ee411ac12…

MALICIOUS

PDF

44.1 KB Created: 2020-08-27 21:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92863d205959506d2801d326ce65e6dc SHA-1: a86bbe7d62a81ad5f88338873a03142d41199b35 SHA-256: b12b341ee411ac12963730da47ebdd04ded6e499c7ea7b281a7bb2e873228c26
160 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text related to 'Stellar phoenix outlook pst repair 9' and includes the malicious URL, suggesting a lure for users seeking software repair. The heuristic SE_PASSWORD_ARCHIVE_LURE indicates that this document might be part of a multi-stage attack where the actual payload is password-protected, requiring further user interaction or a separate download. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, which are likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=stellar+phoenix+outlook+pst+repair+9
    • http://tonog.siglapscec.com/uploads/1/3/0/7/130776483/mevuzezubo.pdf
    • http://files.fineconsignhickory.net/uploads/1/3/0/8/130874130/danusulemorogu_lopazekene_soderusezenep.pdf
    • http://files.varsity-prep.com/uploads/1/3/1/3/131398322/wegasup_famawol_nojofaninudefas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/genutawonut.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/planos_de_instalaciones_hidrosanitar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8720/files/vebebetosunojovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/19785409299.pdf
    • https://cdn.shopify.com/s/files/1/0466/3099/4085/files/formula_para_calcular_la_pendiente_de_una_rampa_vehicular.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/android_games_live_gta_5.pdf
    • https://cdn.shopify.com/s/files/1/0439/3874/2440/files/airdroid_app_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/ambiente_de_trabajo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/80984065369.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/87517315140.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_off00006e2b.bin
1f5fa1fb479ceef463cda41d661cbfd45896d7437e610af683ebfc04a5ca8696
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2B 5296 bytes
font_01_sfnt_off00008017.bin
63bb4e0d7f8221a14605cda16672d463d7f2f39e426bb3cf2bef004d37a2cbf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 10456 bytes