Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac75950623db86f7…

MALICIOUS

PDF

32.2 KB Created: 2020-08-23 05:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec29e5f33e6c0591a05d24673a5ea90 SHA-1: d8225d504d9610097bae0a630bd6c9b948bc81fb SHA-256: ac75950623db86f7767fa0fff01e2a27089d86bc075f15469c054e911a50c3bd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=ayodhya+kanda+in+telugu+pdf'. Additionally, it hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify this as a phishing or redirection 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.com/pify?keyword=ayodhya+kanda+in+telugu+pdf
    • http://files.australiasmedium.com/uploads/1/3/1/3/131384436/d1f53ebd.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/bajegerofatevivolugovujoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7546/9473/files/31558601175.pdf
    • https://cdn.shopify.com/s/files/1/0459/1678/2741/files/oppo_f1s_android_version_upgrade.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/88266130834.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9469/files/3645561982.pdf
    • https://cdn.shopify.com/s/files/1/0428/9187/0375/files/tafipowegonesosuzow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/84545875159.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/toweboposonafopeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/92923818108.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/32022586875.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/66979762945.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/nazirajudedufijodope.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_off0000429f.bin
7737240b765234a313487f6059cfc91a93a6165070ee7cacfdf460415bb823eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x429F 5184 bytes
font_01_sfnt_off00005452.bin
6e7582423e9b38aaf771d535c444351f08cb6cc2cb9320d6e6c4a8313171f17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5452 9280 bytes

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