Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b3ca86de9d2a99…

MALICIOUS

PDF

53.3 KB Created: 2020-08-21 06:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97adcab6242c5703a76c148b4f004e22 SHA-1: 4540b9776cd9adaf48d48119b2222c96b692f0a9 SHA-256: 95b3ca86de9d2a9941d6b7042eea8d664820e5a075c203544e994475f6c79042
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=magazine+article+template+docs'. This URL is presented within the document body, disguised as a link related to 'magazine article template docs'. The presence of numerous external PDF links also suggests a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=magazine+article+template+docs
    • http://files.veblaw.com/uploads/1/3/0/7/130740049/f83b75d973d66.pdf
    • http://files.antoniacundy.com/uploads/1/3/0/8/130873849/106bc379df.pdf
    • http://files.makeastatementjewelry.com/uploads/1/3/0/9/130969477/kifumejojafabet.pdf
    • http://vowinajul.wewandertogether.com/uploads/1/3/0/8/130814328/mifusureb.pdf
    • http://files.kidaround.shop/uploads/1/3/0/7/130739688/7726410.pdf
    • https://cdn.shopify.com/s/files/1/0441/0313/9480/files/61817270598.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1085/files/canara_bank_rtgs_neft_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/judifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/gadutevodorazelizolapena.pdf
    • https://cdn.shopify.com/s/files/1/0446/9293/0716/files/12th_zoology_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/xumopor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92835403356.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/3605781794.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/sufemikikinezobojosox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008221.bin
c57ba0ceadf51ecc62b37409205c51073fc1294a295d9a5e8b1c7cba4805e1dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8221 5236 bytes
font_01_sfnt_off000093d3.bin
faf87eb804646f3f5a60846f0c422c229363f8f70761347c073a09147ebce311
pdf-font-stream PDF embedded font (sfnt) at offset 0x93D3 11652 bytes
font_02_sfnt_off0000b9de.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DE 4324 bytes