Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9bca61798e9c18…

MALICIOUS

PDF

35.2 KB Created: 2020-08-27 23:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad38250a1df63947835a270cd2034760 SHA-1: 5b5888fdc1a2875582b1b12c5306752902b8c06d SHA-256: ec9bca61798e9c185b95d183193e5033f7144bfe508181299a75dc09b2eac187
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically a URL that appears to be a keyword-based redirector. The document body, though heavily obfuscated, contains text related to a '12 std biology book pdf in gujarati' and the malicious URL, suggesting a lure to trick users into downloading or accessing harmful content. The presence of numerous embedded links, many pointing to Shopify domains but ultimately leading to a malicious redirector, indicates a phishing or social engineering attempt.

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.me/pify?keyword=12+std+biology+book+pdf+in+gujarati
    • http://files.oregonoutbackadventures.com/uploads/1/3/2/6/132695568/ddee3e23aa.pdf
    • http://files.mielapothecary.com/uploads/1/3/1/4/131407357/puriwirig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuketunaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/puvopezikawate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/relative_clause_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/mariam_khan_reporting_live_star_plus_par.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/niserinesevifufipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/wilitufumopejazerezonap.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/42913082451.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/28669396322.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_off00004b33.bin
2064988f13df5de7f5ce2f010c04924e0e43420aaf8f3826b7ebbc4aec3a2bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B33 5680 bytes
font_01_sfnt_off00005e97.bin
351452e3ac0d65a733d3cdd710c40934fa6a22166e6c242e112e2f6185a00d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E97 9840 bytes

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