Malicious PDF — malware analysis report

Static analysis result for SHA-256 cceee9187c6b45aa…

MALICIOUS

PDF

52.2 KB Created: 2020-08-07 03:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4da08dc99400471692639b928c3dcbcb SHA-1: 2a5f65b2d9979a8232aeb68acce72ba9c41527e0 SHA-256: cceee9187c6b45aa3b99cd40bcf43193c7c7c5df546c93ddcc0d8dc30407a1c5
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is https://ttraff.cc/pify?keyword=ret%25C3%25B3rica+e+argumenta%25C3%25A7%25C3%25A3o+pdf, which is flagged as malicious. The document body itself is heavily obfuscated and contains corrupted text, but the embedded URLs are the primary indicators of malicious intent. The presence of numerous links, including those hosted on Shopify, suggests an attempt to create a link farm for SEO poisoning or 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/pify?keyword=ret%25C3%25B3rica+e+argumenta%25C3%25A7%25C3%25A3o+pdf
    • http://files.clearmindpsychiatry.com/uploads/1/3/1/8/131857815/e8299b2.pdf
    • http://files.lincolnmarchingcougars.com/uploads/1/3/0/9/130969529/34b1d.pdf
    • http://files.draytonparish.org/uploads/1/3/1/4/131407194/nukonojaruriga_jebovamul_dibul_mupumuvisamazum.pdf
    • http://files.mrstellyshistoryclass.com/uploads/1/3/0/8/130813409/2152703.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/dugaroperifefujazibuzages.pdf
    • https://cdn.shopify.com/s/files/1/0433/8230/9029/files/75285168099.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/timanekelesimovaloxapamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/95241553574.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/lupebogizeletotafidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/43322135446.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0433/6995/5486/files/53552444670.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/65928249717.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/xasetalomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/mebas.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/fiviboxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6411/files/nebofamalegemusoluxegu.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_off00008921.bin
0210a70acfb23e7753ccd6fde6308b14d5176b681c8f59824006c10c781b765e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 5908 bytes
font_01_sfnt_off00009c14.bin
ea096404d95165c75be34b84eebe4b8e550a1778e3c1c8e02d512c73a2328af6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C14 12616 bytes