Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eaf8dd004e206de…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 22:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a589d07c871af5eda283dd46f22f809a SHA-1: 2a81c7594f5720241a90a39e63d141d7d8423474 SHA-256: 2eaf8dd004e206de4cabe953099c4fa308216bc7c4e4b7a8fc849459b2f222b1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, https://ttraff.ru/pify?keyword=brahmastra+by+ajay+gulati+pdf, is identified as a malicious redirector. The document body contains obfuscated text and metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=brahmastra+by+ajay+gulati+pdf
    • http://files.michaelmakovi.com/uploads/1/3/1/4/131452976/6f6a8e526.pdf
    • http://xajutixi.nzhautboy.com/uploads/1/3/2/7/132710712/lifaputigosoxitife.pdf
    • http://files.dalessandroscouting.com/uploads/1/3/2/6/132682048/burogam-mamevigik-tiwis.pdf
    • http://wofimota.cypresspointportal.com/uploads/1/3/1/6/131606349/mekebigakiwufofebuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/87720022655.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/46772767478.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/55957122204.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/59267023300.pdf
    • https://cdn.shopify.com/s/files/1/0437/2473/4613/files/71472751793.pdf
    • https://cdn.shopify.com/s/files/1/0430/4109/5834/files/jisawomutozelexesaru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/pupagilaxemem.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/the_carries_diaries_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/marketing_assistant_cv.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zanuzijavamurogelakiriwe.pdf
    • https://cdn.shopify.com/s/files/1/0450/1487/6310/files/vampire_masquerade.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/92091131761.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_off000053bd.bin
447fccc1f7b8ec71e67a3b88eb9d7ab2a8aa263a69dc308d3a783a5d8320d055
pdf-font-stream PDF embedded font (sfnt) at offset 0x53BD 5820 bytes
font_01_sfnt_off00006770.bin
a9e28458e431b0cb8b523f38e37ac7de99362ad81572e9873ddcc36330262ead
pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 14980 bytes