Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bffd640bfbdaf8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-01 09:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48bf1271591d05cf7d1de85173ebb78f SHA-1: 3bf2cb98f688f2d09f41ede2bf0ab5f8bbf59c2d SHA-256: 89bffd640bfbdaf8aa31fa8aaa3332824ec9ff3228fd877b68b8d797e7af316c
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to manipulate search engine results, leading to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/wb?keyword=second%20moment%20of%20area%20formula%20pdf. This indicates a phishing or scam attempt leveraging SEO techniques to distribute malicious content.

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/wb?keyword=second%20moment%20of%20area%20formula%20pdf
    • http://files.samuelclemens1856.com/uploads/1/3/0/9/130969636/palegejufav_tuginuzesug_rusesoxojuja.pdf
    • http://files.moses-michael.com/uploads/1/3/1/3/131380845/teref_vezowiraga_vopuso_reseloze.pdf
    • http://files.steam-era.com/uploads/1/3/0/7/130740586/nidamabebezogore.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/29498593872.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/76447670325.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4455/files/kitono.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/33263254698.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/78714426657.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/31258389161.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/fakowaxevuminemisabiwit.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/55440015196.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/jupujifunusogetujo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/wojotelusozole.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/csgo_config_file.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_off00005d28.bin
35c1464bdf3e9591eabb5facec093dd3cb9500bf861a348bf76beab7a234d7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D28 5228 bytes
font_01_sfnt_off00006ed8.bin
b19a50c24599260d7f2be40666b4ab0fcc3fe0b574c7c2a1c816fecb53ea3467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 12936 bytes

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