Malicious PDF — malware analysis report

Static analysis result for SHA-256 896117f1e4da8849…

MALICIOUS

PDF

39.2 KB Created: 2020-08-25 08:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec9e42ad59e27f1bd32cabcf2f1f1df SHA-1: 2b82c0d0e8a3de2058cce086d08a81d858486492 SHA-256: 896117f1e4da8849b962c484390734de923b31b7e323eef74518e7c41285df5b
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a teacher's guide, aiming to trick users into clicking it. The link leads to 'ttraff.cc', a known malicious redirector. The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of a critical PDF redirector heuristic and ML classification strongly indicates malicious intent.

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.cc/pify?keyword=grade+6+english+module+teacher%2527+s+guide
    • http://parudili.asapbwh.org/uploads/1/3/1/0/131070674/rosetogulomez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/15082461174.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/xugapogebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/deterulegojojupitot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/lixewutabese.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/20763154238.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/54157870384.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/adobe_reader_converter_free_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/quicktime_movie_trailers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/nijedotisoxejejuzap.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_off00005b7d.bin
5f648f3a9979a5f598587607a8e03871f73a1ecda03681c6c459c1793d6fb9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 5572 bytes
font_01_sfnt_off00006e46.bin
196754cf4457ac10ccf4edde17bc5f98d2d1f7aa4aec72e2992838dad1efe611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 10028 bytes

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