Malicious PDF — malware analysis report

Static analysis result for SHA-256 b707b0f27897f485…

MALICIOUS

PDF

50.2 KB Created: 2020-08-21 22:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b360aa009cb922b857556c47eddc952a SHA-1: 7c59fbeec49eba6e6aba24a2719735ffef9829ea SHA-256: b707b0f27897f4859e2034ef8d21d3b0e2a4798493db5880ed5db20c805fff39
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used to obscure malicious destinations or to create a link farm for SEO manipulation. One of the primary links, 'https://ttraff.ru/pify?keyword=balangir+express+platform', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the primary malicious URL.

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=balangir+express+platform
    • http://basogo.kristincrenshaw.com/uploads/1/3/0/7/130775075/8799960.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/pasobapuxoberagilap.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/daxewaxosenupiradizelufar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/fuxenezinariragi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/big_ganga_tv_show.pdf
    • https://cdn.shopify.com/s/files/1/0447/2363/4330/files/como_hacer_un_cargador_de_bateria_automotriz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/tsv_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0561/files/godwin_s_cabalistic_encyclopedia_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/april_2020_calendar_wincalendar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/toduzizavobanolodu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/kukimofobisoruketovuzefub.pdf
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/cover_letter_sample_form.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/
    • https://cdn.shopify.com/s/files/1/0437/4895

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006669.bin
4470da3a101fb207aa98e39547917081d37d93e728e51192828ae997df81f6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6669 5336 bytes
font_01_sfnt_off0000787c.bin
2ae861ea648a1012e9efb340cbdc43b139c0b1808d975683c8132869376b0c1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787C 14720 bytes
font_02_sfnt_off0000a663.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA663 16164 bytes

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