Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ebbd7c665af536…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 07:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa5157b116f588078c582033b8213a7 SHA-1: c5162853a394bf8828599d81267af3942a485a1f SHA-256: e9ebbd7c665af53635a95ec3f417e209c08d6ac5d61b8db78ebbe2ec24042030
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com and redirect to malicious infrastructure like ttraff.ru. This indicates a social engineering attempt to lure users to malicious sites under the guise of providing educational materials. 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.ru/pify?keyword=six+kingdom+system+of+classification+worksheet+answers
    • http://files.rangerrodgun.com/uploads/1/3/0/8/130873951/posofuzuwekewavexu.pdf
    • http://files.magnificentheavens.com/uploads/1/3/1/6/131606453/rugurezazokun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9681/7312/files/xababopevogavetu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/multivariate_data_analysis_seventh_edition.pdf
    • https://cdn.shopify.com/s/files/1/0447/1003/5609/files/because_he_lives_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0454/2945/7064/files/the_v_games.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/76263387934.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/96943898110.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0434/8362/7686/files/wokazexigisevebivom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/inpatient_psychiatric_treatment_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/12088125902.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/69798062893.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_off0000589f.bin
42a751d69877a824933545a716bd128a8159c275cf3404a2d789a5cad047651a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589F 5864 bytes
font_01_sfnt_off00006c7d.bin
30cc276e33c4cf0f69375c996585073196f9f95197a63002cb7d45d892c42c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7D 10588 bytes

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