Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7953773142c776…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 13:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a5e539edcd30ecf2b4b45a948a61e44 SHA-1: 1a4d156679e84eefe1f0b5eceb85c972175665d9 SHA-256: 7c7953773142c7764aacaa830a5a4ee97ed7a2e3f47a18d87abde9bb33cdef7e
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=all+about+me+worksheet+free+pdf
    • http://files.dryer-vent-doctor.com/uploads/1/3/0/7/130739062/3073871.pdf
    • http://files.huningtonchase.org/uploads/1/3/0/7/130739287/buxefaponibakaw.pdf
    • http://files.consultorianora.com/uploads/1/3/1/3/131380295/7609107.pdf
    • http://sataxaw.ancientwavestudios.com/uploads/1/3/1/0/131070109/rifulawelegok-xagixaj-rabis-nanazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/zujoditedapokasivujipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/how_to_indent_on_google_docs_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/ashcroft_mermin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/10250399145.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/72230016638.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/xudowipuju.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/67875895852.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/gisidegupujawijubaviguga.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/biboguj.pdf
    • https://cdn.shopify.com/s/files/1/0434/9919/2486/files/75804779536.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/maths_worksheets_for_year_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5569/files/create_marksheet_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/69924800537.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_off00006224.bin
e085cc4dc7dbbf1b54e0947b9baacfd1d42e6fb667a772d8b7b54490c893c9b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 5568 bytes
font_01_sfnt_off000074f0.bin
5da98d3dadde35d0129237b27bd9105f82c919efae0992fa933102876c5b6f68
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 9888 bytes