Malicious PDF — malware analysis report

Static analysis result for SHA-256 6435330128aed4b9…

MALICIOUS

PDF

33.7 KB Created: 2020-08-14 01:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87f9d6335638e2a379259ec33eeb6e26 SHA-1: 6f86ea693ff00bcfc48a06301ab0a4e7d7e930a8 SHA-256: 6435330128aed4b93fc87c40bf9bb50cd997174d6e1fde2fc258e4981584b7c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=beko+wtg841b2w+8kg+washing+machine+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a washing machine manual, likely serving as a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=beko+wtg841b2w+8kg+washing+machine+manual
    • http://files.christiansciencecrystallake.org/uploads/1/3/0/7/130739210/1830638.pdf
    • http://files.printingeria.com/uploads/1/3/2/6/132681513/2601647.pdf
    • http://files.profilesbylynn.com/uploads/1/3/1/3/131381679/kujukil.pdf
    • http://zolek.sapritalia.com/uploads/1/3/1/6/131606346/rafepajupu-teridotusaguj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/xobunuwositi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/44026355157.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/gutuvimesasijelomuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/pulse_secure_host_checker.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/wujupesalewuped.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/atlas_of_abdominal_wall_reconstruction_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/gramatica_a_impersonal_expressions_infinitive_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/33293900111.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/49490277047.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/28633391827.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004550.bin
7de7911d860aa7f9dd5549984359a02557d77c237c343686f62a3721fd25b1a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4550 5928 bytes
font_01_sfnt_off00005976.bin
26fd2f7d99bbd6198a85856e687c54c0556433b8b62eda7d3f22e8795c4a026b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5976 9488 bytes

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