Malicious PDF — malware analysis report

Static analysis result for SHA-256 8facf61d368b54d0…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 21:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbeb8d68ec945d615d2bd0d25f462288 SHA-1: 86824da2822eba875e215e7425e1be936bca4936 SHA-256: 8facf61d368b54d001881d15ef246aac284addaab8af07afbdd674119ff5c1f7
128 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 'ttraff.ru'. The document body, despite being heavily obfuscated, also contains this URL and appears to be a lure for a PDF to Word conversion tool. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+pdf+to+word+adobe+pro
    • http://files.evolvemovementcollective.com/uploads/1/3/1/4/131437953/f1a435641851d.pdf
    • http://files.truelifealive.com/uploads/1/3/0/8/130815026/tuxajabeka_mitinirezoxegux_jojodu.pdf
    • http://files.nolartslearningcenter.com/uploads/1/3/0/8/130873820/libinanaxefij-lavojozu.pdf
    • http://files.perichoresis.de/uploads/1/3/2/7/132740586/963872376a0.pdf
    • http://files.eosfinancialplanning.com/uploads/1/3/0/7/130775309/tezemim-xesin-ripoki-tuwitewuruj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/anorectal_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/caballo_de_troya_7_jj_benitez_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/dugigefew.pdf
    • https://cdn.shopify.com/s/files/1/0434/3899/7665/files/92998398471.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/4045811774.pdf
    • https://cdn.shopify.com/s/files/1/0432/5913/4112/files/pdf_to_word_converter_download_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/2959/3245/files/vomilujivimivawiwuxiwefos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/79356899957.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/fajapusareferarojub.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/34792174027.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/basada_en_hechos_reales_libro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/87515570620.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_off000063a0.bin
e317837a720cd69381366dddd280f71879e3e0de80b06427ce50f2bd77c666f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 5020 bytes
font_01_sfnt_off000074d2.bin
1f4c05b71a3a65f0ee9eff417ceb4a47d227618841a798df8a4ec72873b9bc09
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D2 10084 bytes