Malicious PDF — malware analysis report

Static analysis result for SHA-256 431abe11e761e2f5…

MALICIOUS

PDF

48.9 KB Created: 2020-09-04 09:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c8e685f54d459620728d605eecc867 SHA-1: e2b193899d037d6b2a290771a1345096698964ad SHA-256: 431abe11e761e2f556bfdf80f2192086f825ad7c03de586d34bb7ec74bbe1559
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.club/wix?keyword=free+whatsapp+gb+apk+7.+20'. This URL is presented within the document body, disguised as a download link, likely to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broader campaign to distribute 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.
  • 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.club/wix?keyword=free+whatsapp+gb+apk+7.+20
    • https://static.usrfiles.com/ugd/9ec29b_7640b713ad2343d1a0af38f0dbb5f0a0.pdf
    • https://static.usrfiles.com/ugd/81d6a4_189e723d1c604b69b67c34cb01704cb0.pdf
    • https://static.usrfiles.com/ugd/7921d2_ce8ac10f7d9d460d970c6cc8fcfcdc33.pdf
    • https://static.usrfiles.com/ugd/96768c_fe2e3000c88945928126b73a88a21310.pdf
    • https://static.usrfiles.com/ugd/0779a3_a3627c10cc0e4b718cf4869b842c9396.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8647/files/kojoredomitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/4185965852.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/38241680045.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/sopefumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/39616010643.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/xuxaredupuluxiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/64206953480.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_off00008074.bin
889d2f11fc1aaeb7d50e8d9773323525a4a77b3db528f311d214566cf34e0b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8074 5684 bytes
font_01_sfnt_off000093ef.bin
9e8b651363f64cadb4f231e42e1ab0040427f9222e104b5186e286adbe194cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EF 10112 bytes

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