Malicious PDF — malware analysis report

Static analysis result for SHA-256 66689c84b9c5eed9…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 03:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e06c8435ec1f0387f56133d67d849ba3 SHA-1: 732ee566e83260dc9dfaaf0822432af338ef6e4b SHA-256: 66689c84b9c5eed9be007c50bdf58ac4e5a09ba36ab42c8b06e2243858fb3e86
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, disguised as a movie download. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute malware. No scripts were extracted, but the embedded links are the primary attack vector.

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=avengers+movie+collection
    • http://juvote.irishwolfhounddog.com/uploads/1/3/0/7/130738755/zedura.pdf
    • http://files.dalessandroscouting.com/uploads/1/3/2/6/132680962/favosisejuw-gisex-menot-bedunefisibeg.pdf
    • http://files.sdp.scot/uploads/1/3/1/6/131637658/be4c9113a511a.pdf
    • http://files.dvs-cleaning.co.uk/uploads/1/3/1/8/131871701/lipusa.pdf
    • http://jetolo.flatspokecycles.com/uploads/1/3/1/4/131405927/fae9e66130b2c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/1224345356.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/myers_briggs_personality_test_results.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/tagewetige.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/61250761914.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/77980585726.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87195604050.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/adjectives_of_comparison_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/rititevufilobiwozivulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3225/5392/files/70998638926.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/vubivigewutaputige.pdf
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/water_pollution_sources_effects_and_control_measures.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_off00006333.bin
d7e3ab71624f06f4d24f22dae57f0af982bbd29f042e103bfe2958dbda4dd34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 4956 bytes
font_01_sfnt_off00007402.bin
2056b939bd06ab1bd9892f4a4c5f66318c149d7aa0f8e74d32e41429a41ea609		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7402 10780 bytes

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