Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d81fe7fa1f2119f…

MALICIOUS

PDF

35.2 KB Created: 2020-08-15 22:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad393d69689c467bb74a17e4d1e84cbd SHA-1: 573b667ceb30f82b502e7dc1fbe22b3aa3a8a30f SHA-256: 9d81fe7fa1f2119f021cbe14204e1176dbc90bba327fb811a7d2b917a1ef387f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to ttraff.com, are indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains numerous URLs, reinforcing the link farm heuristic.

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/wb?keyword=farmacognosia%20aloisio%20fernandes%20costa%20pdf
    • http://zanek.linkedenergy.net/uploads/1/3/1/6/131637136/2c2bbc603f.pdf
    • http://files.playmusiccompany.com/uploads/1/3/1/4/131483343/xurepu.pdf
    • http://files.woollens.ca/uploads/1/3/1/3/131398308/midixebozevute-safiwipamagevi-jabodefokajudek.pdf
    • http://pesebap.mendonillinois.com/uploads/1/3/2/6/132695550/xizezuwenusa-kuruja-bunuvidaguves-voxemamasu.pdf
    • http://files.northalabamadt.com/uploads/1/3/1/6/131636807/3374ef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8457/7958/files/ridamivevesanadivudojijur.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/nisugomadobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/lavukigumina.pdf
    • https://cdn.shopify.com/s/files/1/0436/1984/4258/files/50966443582.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/aiag_vda_fmea_handbook_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/tamexavajafevafolofikibu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/histrionic_personality_disorder_dsm_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/memamatetazunafexaxanef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6901/files/6719930239.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/28756958484.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/tatigizujokarebomo.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_off0000479a.bin
66a6aede2ec31fe543bff4abb68a538efa05e93bb3c081b0ac181270a7b120de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 5432 bytes
font_01_sfnt_off000059f5.bin
1cc5d13b34bc124a9f1936944e6933aab7b4e0ca682a9c6e14cd1eaa229f0abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F5 11664 bytes

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