Malicious PDF — malware analysis report

Static analysis result for SHA-256 315a2398491dd72e…

MALICIOUS

PDF

64.7 KB Created: 2020-08-31 02:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a483f32cf654d2324b92d162c69001ce SHA-1: 8d2a5a8b2445231a40268d17a1e872e45ad70c66 SHA-256: 315a2398491dd72ed55bcc39dced4914b3939775400ac3c81eb347c34202fe68
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=%25D9%2585%25D9%2588%25D8%25A7%25D9%2582%25D8%25B9+%25D8%25B4%25D8%25A8%25D9%258A%25D9%2587%25D8%25A9+%25D8%25A8+theync'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs, suggesting a coordinated effort for traffic redirection or SEO manipulation. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=%25D9%2585%25D9%2588%25D8%25A7%25D9%2582%25D8%25B9+%25D8%25B4%25D8%25A8%25D9%258A%25D9%2587%25D8%25A9+%25D8%25A8+theync
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/lizubipirijosakaxulokel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9618/5763/files/21918853594.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/lagu_amelina_asyik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/92175340945.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/columns_and_beams_in_building_construction.pdf
    • https://cdn.shopify.com/s/files/1/0436/3563/8425/files/wabutida.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_1ccbf6765e72471da658078afbddcf60.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f07abd4e94e4775beff56f609c3000f.pdf
    • https://static.usrfiles.com/ugd/a640e9_2a9a33b745084f7fbe874d9bd64eb775.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/latex_beamer_insert.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/navy_dress_blues_regulations_enlisted.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/jawejerekuxikisaxege.pdf
    • https://cdn.shopify.com/s/files/1/0460/8691/4212/files/taxonomy_affective_domain.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000bbeb.bin
a7e7ac52436c262a5f5998bb1d2863b3331a784ce943113ee8b493c000f9c3b5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBBEB 31696 bytes
font_00_sfnt_off00007871.bin
fe0a42d4d49625efca053d0062582d07095d17a40d434386db1b6090b38cf7e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7871 4380 bytes
font_01_sfnt_off00008754.bin
e1a709f74177341f492a3c0153aff682f77c7c748fe4ebc83a44b61043b6e53c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8754 17576 bytes
font_02_sfnt_off0000a1bb.bin
716deb222422c072385626b75afd96dbbf74c2fd9bb313419f5b9774fbd8a95b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BB 7664 bytes