Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2144e02ed0026d0…

MALICIOUS

PDF

53.0 KB Created: 2020-07-11 15:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcb6bd9bc41d6b1525fa077291838f7c SHA-1: d285ceeb48d7665d7d7f2a77e0d758c06dcd84f1 SHA-256: d2144e02ed0026d02d213cf3cb9e6b62bdab623231d8757f8e1cc538753ac371
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link to 'ttraff.cc', indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=english+worksheet+for+class+1+cbse
    • http://files.nickcharlesmadson.com/uploads/1/3/0/7/130739362/9640546.pdf
    • http://files.jennifercoffey.net/uploads/1/3/1/8/131871778/6254284.pdf
    • http://files.jodierandolphdance.org/uploads/1/3/0/9/130969440/4133006.pdf
    • http://files.jacobtnyoung.com/uploads/1/3/1/4/131453560/30260.pdf
    • https://gugujiwir.files.wordpress.com/2020/07/50107159445.pdf
    • https://bepakarotoj.files.wordpress.com/2020/06/ranis.pdf
    • https://pefugobojum.files.wordpress.com/2020/07/xobasudotugeviji.pdf
    • https://sexorewidejo682915272.files.wordpress.com/2020/06/97969503982.pdf
    • https://bixibirame.files.wordpress.com/2020/07/tefanej.pdf
    • https://nikeruvebo.files.wordpress.com/2020/07/tomusurinojivozelina.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekutaxawiwasutoxojopelor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/vowepukapudos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26433336276.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/musebupapuvafuzakevepuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/42111651603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32600433864.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c5.bin
abccd3cce1918f74f24c45ecc5931b48a2b7d1839bcc8e50db2a18b240fac8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 5236 bytes
font_01_sfnt_off0000759f.bin
dac079b0a40c18036bd88a14777e770060155d46f661f5a0f22d7089ac820a2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759F 7144 bytes
font_02_sfnt_off000089be.bin
5348a4dfb65e9cd9f8ef8a40ccc3ca6469d0e69b376a3a8c0edf66ada5b3fd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BE 10112 bytes
font_03_sfnt_off0000ac7e.bin
b2b92fcd2919487c650493c91add21b847ed7c13e64e38272e25808cac974a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7E 17492 bytes

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