Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2b7247e0e9ef1f…

MALICIOUS

PDF

46.4 KB Created: 2020-08-20 11:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9394d90f84395499c97a2b87c2c0592 SHA-1: f92ab0ec95d4a9fcdef5c226565137001cb2f777 SHA-256: bf2b7247e0e9ef1f386e8d15e8f17aa19e56a9e605b02bdf703ded62c982cb40
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=bodmas+questions+for+class+4+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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.com/pify?keyword=bodmas+questions+for+class+4+pdf
    • http://peweketu.whitehousevacationrentals.com/uploads/1/3/0/7/130776326/3679763.pdf
    • http://regirekop.karunaforanimals.com/uploads/1/3/1/4/131407995/d3ce09721a26478.pdf
    • http://nadebumu.hiddentreasurenovels.com/uploads/1/3/1/0/131070487/mepumitumatapivavat.pdf
    • http://dorotowi.primalpracticemt.com/uploads/1/3/0/7/130739297/gakaxoxa-wenevizujavax-jitagamef-sivazapup.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5316/files/zetupukiwel.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1587/files/dorisupejenoxumeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/51731540335.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/vulture_city_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/farenigokixelidunodixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/amul_advertising_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/84862328747.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/lugov.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/metal_gear_solid_alert_sound.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/behavioral_finance_psychology_decision_making_and_markets.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/biwumeruxidu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000616e.bin
795ada0fdfe04e53299df70938dc86c49dd49ab1ab6016ddcffbbd8eec68713c
pdf-font-stream PDF embedded font (sfnt) at offset 0x616E 5564 bytes
font_01_sfnt_off0000744b.bin
cd37b9fbb64433fc9aee38dd4b8b672677d130d18ac333375805e8e3c56ecc95
pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 10344 bytes
font_02_sfnt_off000097e4.bin
ccf42771811f3bfcfc4881e0ea26c61020463520b77f542a172ed5d532e4d210
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 16088 bytes