Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2153d9064a9822d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 10:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25e460965b6db46b36a4adb94f28fb48 SHA-1: 924f6bc630817be5676eaa16b1b6e23838e40fe8 SHA-256: f2153d9064a9822df4af32b933e03ece672ce57f33a7f96065b35fb30282bccf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=applied+behavior+analysis+cooper+pdf', is likely used to obscure the true destination of the attack, which could be phishing or malware delivery. 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=applied+behavior+analysis+cooper+pdf
    • http://natijuve.allterrainridersatvclub.com/uploads/1/3/2/6/132681229/7500da67015.pdf
    • http://vazejolur.cercisbrewingco.com/uploads/1/3/1/4/131483167/nozubeta-ninobodoxatalub.pdf
    • http://files.jecreate.net/uploads/1/3/0/7/130775897/gunofiloduvemigu.pdf
    • http://files.brandongillin.com/uploads/1/3/0/8/130813988/72d1ae042a68.pdf
    • http://files.frenchlakebutchershop.com/uploads/1/3/0/8/130874120/padotusamugemir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1276/files/60831901784.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/collections_in_java_durgasoft.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/43823785959.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5644/files/11428167699.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/crucifixion_or_cruci_fiction_ahmed_deedat.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/joveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/reasons_for_abolition_of_slave_trade_in_africa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/aung_san_suu_kyi_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0535/files/3d_city_and_map_generator_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/lezinanuduv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/cambridge_english_advanced_trainer_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/40127080646.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.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_off0000683b.bin
a96d4b13de22ec5b24f09375b4e1af54c85b02393bb17bbd21f0fc0d52a621d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683B 5536 bytes
font_01_sfnt_off00007b05.bin
5f105121c3a6cbc5160f760370f02c2220440fc4df46823567dd389140c82206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 9920 bytes

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