Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e7c145de6d6c55…

MALICIOUS

PDF

35.4 KB Created: 2020-08-19 01:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52aed197a4793a363f042421917a6369 SHA-1: 99e6470f99531a1823461d7025cc1db3eb0936f8 SHA-256: a0e7c145de6d6c55d8a6fe9603d7aeccd58361cfdbfdcfcba2c452d3d2bd0316
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at `ttraff.ru`. The document body, though partially corrupted, suggests a lure related to an "Y intercept practice worksheet", likely intended to trick users into clicking the malicious links. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

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=y+intercept+practice+worksheet
    • http://boniluna.steamboatrockiowa.com/uploads/1/3/2/6/132681670/d2153b197e4.pdf
    • http://dejib.mygentlebeginnings.com/uploads/1/3/1/3/131383314/tonokoko-debuvabalarude-favegonesis-lixevale.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/fawasakatitum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/fuvodidugox.pdf
    • https://cdn.shopify.com/s/files/1/0450/1143/5670/files/igbt_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/gomejugezubinu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/automatize_tarefas_maantes_com_python_download_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/xonokalunazosidozolebaxem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/kajalosukiwadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3030/files/sonuwof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7025/7320/files/vobuxinefadetodeki.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_off00004bf4.bin
03ec05ca9022d456b92d8f3b2ce1768e099c54c852bfc0dd238605a034d2cfcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF4 5108 bytes
font_01_sfnt_off00005d57.bin
ae3c5fc75de89c4b62fbcc3d5f7d3b18c0e0d337740f7f6486fd9be2844a5c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 10088 bytes

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