Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f4039811f1f573…

MALICIOUS

PDF

48.2 KB Created: 2020-08-29 15:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81bf9a7a4fb72241c0329f3873d7cd61 SHA-1: 38b2b29c53c5389ab1b990a002ca2988e09e7486 SHA-256: e1f4039811f1f573f895152198f048bf309865a7d1e2a64ef7d03125b53e682d
168 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document also contains a call-to-action phrase and password instructions, suggesting a lure to download a password-protected archive. The primary malicious URL identified is https://ttraff.cc/wix?keyword=mqtt+broker+android+github, which likely serves as the initial stage for delivering a secondary payload.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=mqtt+broker+android+github
    • https://static.usrfiles.com/ugd/b8c837_3d8d25558c324058b98cf572a12700a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_12989437c7b045778bc8d97e3161f556.pdf
    • https://static.usrfiles.com/ugd/b8c837_530c829f3d8c4b24b6f1f7992115bfd7.pdf
    • https://cdn.shopify.com/s/files/1/0450/2195/4206/files/treatment_of_liver_disease.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/14710947635.pdf
    • https://cdn.shopify.com/s/files/1/0431/1996/8417/files/rinatetitegifatibevos.pdf
    • https://cdn.shopify.com/s/files/1/0436/6109/9161/files/65347242071.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/67787491020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9637/files/familismo_amorale_banfield.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/39381279884.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/38745388882.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/centuries_of_meditations.pdf
    • https://static.usrfiles.com/ugd/b8c837_453b49a91bbe4ca78793cb8de7d4e7ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e5cf08febb645f4a86526b1eacced81.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_off000066fb.bin
e19d09f948cf204f17da33fd32962b7233b667ce99fb8c7503beb4038d763825
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FB 5212 bytes
font_01_sfnt_off000078af.bin
88d80f9c67aff61ba5a5ddab13e836688200acdd5dc7cd9b87706de1941237ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10856 bytes
font_02_sfnt_off00009dc9.bin
360f9308e85403c5f53790ff0313d8921e8f9ae08eaca8e085884f822f4cf418
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC9 16324 bytes