Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93d02ca5f9b1dad…

MALICIOUS

PDF

38.7 KB Created: 2020-08-06 21:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bef98db80f142aa19f35d47c46b85a4d SHA-1: 616f063f7ea73c9ebba300a84ba1e66002e512cb SHA-256: b93d02ca5f9b1dada1901fdfd906f4ba983fdd4b04cd54ce40155fff79cc4802
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=bhartiya+rajyaghatna+in+marathi+pdf, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL and references to 'Bhartiya rajyaghatna in marathi pdf', suggesting a lure to disguise the malicious intent. The presence of numerous other links to Shopify-hosted PDFs, some benign, indicates a potential link farm or SEO manipulation tactic to increase visibility and traffic to the malicious redirector.

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=bhartiya+rajyaghatna+in+marathi+pdf
    • http://files.dreamingofthereds.com/uploads/1/3/1/4/131406082/temezotiz.pdf
    • http://files.emmaryanski.com/uploads/1/3/0/9/130969580/7250952.pdf
    • http://sizipa.somedailyjoe.com/uploads/1/3/1/8/131857631/6424885.pdf
    • http://files.neardeathexperienceuk.com/uploads/1/3/1/8/131856158/keruz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5375/1189/files/leisure_suit_larry_reloaded_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/32921519097.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/best_ps2_co_op_games.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/nadukomadokukugusodawupum.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8871/files/50140028256.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/nixevimu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/56465834171.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/75925015868.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/noluzomatetadobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9487/files/57080895387.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_off00005956.bin
a6894daca5cb9397d678ceecd6dc5fe62c1fb4e107759e8751bc5f97fda4f95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5956 5472 bytes
font_01_sfnt_off00006be1.bin
e1c9f48ba5ea1b31609fb39229a6c299892c627851cc6f6e3c6be86b2e4f505c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 10012 bytes

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