Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca0dca7dc8c959f…

MALICIOUS

PDF

50.6 KB Created: 2020-08-28 01:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd9a290a22c67d0321b6253dfffb691 SHA-1: 8fa76bb8f296675a4f30f47e9ed6fd017cae845b SHA-256: aca0dca7dc8c959f2380a9610613f48808b8ebba82576c95bdc4f27825912ad2
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=tecnicas+de+redaccion+coherencia+con, which is also listed as an unknown URL. This indicates the document's primary purpose is to redirect users to malicious infrastructure.

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=tecnicas+de+redaccion+coherencia+con
    • http://wukaz.anaheimroofpros.com/uploads/1/3/2/3/132303195/177102.pdf
    • http://luwaraj.therapeuticfootcare.com/uploads/1/3/2/7/132740449/2227357.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/23113731964.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/is_auchi_polytechnic_part_time_form_out.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/87601693159.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/zujexasojazebinozedixezuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/zillow_saved_homes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/nomutavuzitixuteluzoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/werinoxanumuwenavinadok.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/wotebopor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/pajofomupogozekewibava.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/nexuwosazizebitewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4727/2098/files/klasifikasi_akne_vulgaris.pdf
    • https://cdn.shopify.com/s/files/1/0435/9022/1983/files/kolkata_new_movie_site.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_off000085a2.bin
f869da7505a614448423b2e8ba1a68a7e6637a56b4d72e14a9ccaab0e4cab9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A2 4944 bytes
font_01_sfnt_off0000965c.bin
2fedf78a811ce16032cb5c347e63550a5716b295affb20ffe25f04deab19d698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965C 11492 bytes

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