Malicious PDF — malware analysis report

Static analysis result for SHA-256 3206913da8e7ffbc…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 17:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c9a16c94ce22671b0d6e5c903b9ee5 SHA-1: 71282a7a6178322d5e1c7c3a455a5a7b377e3c13 SHA-256: 3206913da8e7ffbcebf1fe0b4630104ac6a5460958caa7b75d01377e17dbe4eb
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'internet pdf download' and the malicious URL. The primary malicious URL is 'https://ttraff.ru/pify?keyword=advantage+and+disadvantage+of+internet+pdf+download', which is designed to redirect users to potentially harmful content. The file also exhibits characteristics of a link farm, with many links pointing to Shopify domains, likely to improve SEO for the malicious redirector.

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=advantage+and+disadvantage+of+internet+pdf+download
    • http://files.ravensrelics.com/uploads/1/3/1/4/131411688/4251714.pdf
    • http://files.andressalazar505.com/uploads/1/3/2/8/132814593/1040767.pdf
    • http://getopi.bglionstar.com/uploads/1/3/0/8/130874493/forixozufuxixalegew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/mobefosefebodadadegabax.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/nilowasefigozoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/developmental_biology_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/kedel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1136/7331/files/classical_mechanics_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5061/files/antiacidos_para_embarazadas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1479/9012/files/66760695566.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jesuit_extreme_oath.pdf
    • https://cdn.shopify.com/s/files/1/0434/5502/1223/files/99885424740.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/61973396742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/52181295243.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/71602556133.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_off000064f8.bin
2c859ca471c66356e43ff10a5bd2e4edf84302998c400e451b38d1c012a3108a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 5352 bytes
font_01_sfnt_off00007756.bin
3dade7515df8173282bd16f98d365326e34c3e26cc75e60be46f98d134dd2c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 10340 bytes

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