Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae47cce6572cb78…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 23:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0647a4969fd8f3c0d7407329578323c2 SHA-1: ed83993c1fe14cd0a9ece0dabb07aa5ccb193613 SHA-256: cae47cce6572cb78717f2aba0f42eb42a5b5c86f4d33a6fe603c12555c0a982b
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an Android update notification. The document body and heuristics indicate a lure to click the embedded URL, which leads to a redirector. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links.

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=atualizar+android+samsung+tab+3
    • http://files.iodenewbrunswick.ca/uploads/1/3/1/3/131383242/0261e75.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/4491203003.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1895/files/torapikawuvejawunov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/fezuromajew.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/burner_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/90851752943.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/62116242183.pdf
    • https://cdn.shopify.com/s/files/1/0436/2531/6514/files/12338696789.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/71156995335.pdf
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/astm_a193_a193m.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/79931453414.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/88177118182.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/sapomiwavenoduwozofabote.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_off00005305.bin
cadb5cfc29f400ddbb49e2a446c93ebaa35a0ae273067ce63108ad866e3b1bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5305 5488 bytes
font_01_sfnt_off00006590.bin
9a07630f24cf78d66f8d240506d4c2caf084bb15e42ea47b065d33cf4dff4c57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 14640 bytes

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