Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4b9dae361f771e…

MALICIOUS

PDF

101.6 KB Created: 2020-08-19 23:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f77f26978a1a4ceec30aa22626ed75 SHA-1: 8dd5cf853ab299569ff99779cc90535c186d15d2 SHA-256: bc4b9dae361f771e95f2c976c759f08f4015df0d00e9246775b9b10fbedab071
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, including a known malicious redirector. The document body contains the malicious URL and text that appears to be obfuscated or corrupted. The presence of a link farm on Shopify suggests an attempt to obscure the true destination of the malicious traffic.

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=contemplate+on+god
    • http://radefug.margolevi.com/uploads/1/3/0/8/130813528/wivadi_gofibu_wujig.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/gajawilixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/pufiwuxejanovuful.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/33773268004.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5074/files/40689783856.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/nekiwomivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/dujuvetovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/sublime_text_3_free_license.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/brooklyn_college_scholarships.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_off00014302.bin
2c322cf555273d6f1ee7f48eef2db593964df7f6c97a4c4bb81289ccdcacbe1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14302 4908 bytes
font_01_sfnt_off0001539f.bin
e264f48cb0d7a05228afd60f01a0ca854354337aba137e4e3c22ed42e18205ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1539F 18484 bytes

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