Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba365e3e98365d6…

MALICIOUS

PDF

58.6 KB Created: 2020-08-09 01:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e0dd502d0d2c1ea57ba2dac34e0112 SHA-1: 2ff0e18cf7378103cfb6f68f4097f06c9efa884d SHA-256: dba365e3e98365d6f920879199ca1fc44c8e04408a612fddada62e742944e881
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body also contains text suggesting a 'download' lure, which is corroborated by the 'SE_DOWNLOAD_BUTTON' heuristic. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm intended to distribute malicious content or improve SEO for malicious sites. The primary malicious URL is 'https://ttraff.ru/pify?keyword=biology+sinhala+notes+pdf+free+download'.

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=biology+sinhala+notes+pdf+free+download
    • http://mugol.kcbeckerphotography.com/uploads/1/3/1/4/131453674/zatusudorola.pdf
    • http://files.twelvelittletales.com/uploads/1/3/1/4/131438353/suzijigamakuwub_nozalov_rugolotu.pdf
    • http://vubajex.isca-mediation.com/uploads/1/3/0/9/130969060/gikukeduxaluxe.pdf
    • http://mugol.kcbeckerphotography.com/uploads/1/3/1/4/1314
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/kiriselatetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/wozevogesezepenizej.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/62337252784.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/44646807577.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/intel_graphics_4600.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/81181675484.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/gleanings_baha_u_llah.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/descriptive_analysis_in_research_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/77435005318.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/govugat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.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
font_00_sfnt_off00005faa.bin
301fa03fb2d0a02b45e8e0f7600ef3638e6c3a76ed8125372d7013649389b7de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 5544 bytes
font_01_sfnt_off0000729c.bin
82d7a15a58698eedc6904751ae62e1c98aa03305173b99806ecd885f2841f4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729C 3904 bytes
font_02_sfnt_off00008175.bin
507eaf87b8636d40a358ef0a8adc463ee532371a49407a198d7d62de5daf9a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 20728 bytes
font_03_sfnt_off0000b696.bin
25b1b5d5a142d3ea1df0efaa916fd018892f7b104f4ed0a1ee82d931ceaf00bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB696 10552 bytes

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