Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb8070177e16d9a…

MALICIOUS

PDF

51.8 KB Created: 2020-08-10 07:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc51dbd5fe17e0704f0e503669e38019 SHA-1: 78aabd8b41af13855f5379820ea6c156464b074e SHA-256: ceb8070177e16d9aeeec7045bc81564bf93f62c8c3519b8affbfa486f8181ca2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This link is presented within the document body, disguised as a download for 'Brunner and Suddarth 14th edition pdf download'. The PDF also contains a large number of external links, many pointing to Shopify domains, likely part of an SEO link farm to improve search engine ranking for malicious content. The presence of a visual download button further supports the 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.
  • 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/pify?keyword=brunner+and+suddarth+14th+edition+pdf+download
    • http://files.mikeflament.com/uploads/1/3/0/8/130814644/fisakibutav_zewetezot_xolowujatikod_mumivuluj.pdf
    • http://files.zegermanmarkt.com/uploads/1/3/1/1/131164295/nubutelorewazenuf.pdf
    • http://xasevep.drewwatsonpups.com/uploads/1/3/1/3/131380213/3657916.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/advanced_computer_architecture_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/dupuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/78791498037.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/d_d_human_subraces.pdf
    • https://cdn.shopify.com/s/files/1/0437/6392/5149/files/65998927601.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/65051009408.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/cerebral_palsy_gait.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/11612308881.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/2311923689.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/decimal_to_hex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0328/files/35808114045.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/zedena.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/pivux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753d.bin
26ce1ed497fc06e14fa7826f472fd476d25b4964fce0066bd549ca0faaf8212f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753D 5292 bytes
font_01_sfnt_off00008749.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8749 1800 bytes
font_02_sfnt_off00008fd7.bin
7f5881c7a9558474d36e703f2c6b7d287173a188f91e27cd5d4be7e7de4f3202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD7 10416 bytes
font_03_sfnt_off0000b365.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB365 4324 bytes

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