Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b1bc5fbf10bd3f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-01 07:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 941c3d02c18be2f7f49d1fbc68465070 SHA-1: 4df85d4f0d586b62a071a3f242a268932ecba46c SHA-256: b3b1bc5fbf10bd3f3d8e06388578b70dab89d67cb8a3c93b7a41f45fabb33e1f
120 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, pointing to 'https://ttraff.cc/pify?keyword=the+talented+mr+ripley+pdf+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify-hosted PDF links, reinforcing the lure to external content. This suggests the primary goal is to redirect users to potentially malicious sites.

Heuristics 3

  • 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.
  • 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/pify?keyword=the+talented+mr+ripley+pdf+free
    • http://files.uvresa.com/uploads/1/3/2/6/132695194/196823.pdf
    • http://files.valkyrieglass.com/uploads/1/3/0/7/130775400/tupuburafij.pdf
    • http://files.elliottfamilyreunion.com/uploads/1/3/1/6/131636655/8015866.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/nosobuluw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/jawadirofaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/62093445951.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/69895619221.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/74468320723.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/susurobedibadexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/88903704815.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53151925343.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/gevivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/bojenisoriremapuxefuk.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_off0000676f.bin
63e72bb44d7ed2ed2774b0e333a6ba1e56a2400de4bf2d2d37c23c09511d29d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 5152 bytes
font_01_sfnt_off000078d5.bin
7bb8fdd69a1f224f072b77054bcba72c42f5d00cb55e7ab26f20dcba9fb47d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 10020 bytes

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