Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc11704f4bb3377…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 16:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab8b9619aee40a4ef48498ee4aa8e23c SHA-1: 9bdfa7fd92f7ac6cb407732c87f8779a97dfb161 SHA-256: fdc11704f4bb337736c6d5210c980cff4c3b379221c6f97dad30a4617b456216
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a malicious redirector. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the malicious intent. No scripts were extracted from this sample.

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=answering+reading+comprehension+questions+tips+ks2
    • http://files.lincoln-realty.com/uploads/1/3/2/6/132683000/wosidekoz.pdf
    • http://pejetewu.shaeshaeshae.com/uploads/1/3/2/6/132681670/61e96.pdf
    • http://files.mspokrantsband.ca/uploads/1/3/1/0/131070526/43b4a4fd.pdf
    • http://desobilej.kwikwashlaundromat.com/uploads/1/3/0/8/130874583/73bc834aed5.pdf
    • http://files.catherine-banner.com/uploads/1/3/1/4/131453267/f6c2aa21.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/datoginowetimigadu.pdf
    • https://cdn.shopify.com/s/files/1/0443/6285/8652/files/data_analysis_in_research_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0439/0171/4587/files/mizog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/biblia_el_nuevo_testamento.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/53397693145.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/sony_ericsson_w_580i.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/all_weather_strategy_portfolio.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/47046682494.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/dujawasupuzegetubelej.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/3405366866.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/35365847728.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_off0000633c.bin
bf75161e81fb93beb5a419124a87051322bf5c5d7164b1523cdee0def382703a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633C 5856 bytes
font_01_sfnt_off00007709.bin
99fbd2b24acfc9662a56c28acb593d28dabd893c1a5b2f5b1a45a50fbb187544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7709 9888 bytes

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