Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fd659b98ff7df6…

MALICIOUS

PDF

45.7 KB Created: 2020-08-25 04:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2458a7595d68b9cf1589d2becabb4f2a SHA-1: a1f981f0be34aff5b7359230f5f7d28bfb80e22a SHA-256: d3fd659b98ff7df67b7dd5900214b34814db203a3779f6ca07f5731d47b4a8fe
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented to the user with a lure for a 'dx ball game free pc'. The document also contains a large number of embedded links to various domains, many of which are hosted on Shopify, suggesting a link farm or distribution network. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=dx+ball+game++free+pc
    • http://kotija.acct301.ehabacademy.com/uploads/1/3/0/8/130813714/bupolo.pdf
    • http://zalosi.typea-wesome.com/uploads/1/3/2/8/132815176/widivirijof.pdf
    • http://files.azkillerbeessoftball.com/uploads/1/3/0/8/130874518/jemizip.pdf
    • http://files.treevalleyfencing.co.uk/uploads/1/3/2/6/132695258/5464022.pdf
    • http://files.akws.org/uploads/1/3/1/3/131383821/8162178.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/book_wings_of_fire_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/xutapapunogonuzupajivok.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/que_es_el_autoestima.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/ielts_speaking_questions_and_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/82294804908.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/dictionary_of_advaita_vedanta.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/24342890608.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/you_tube_usawatchdog._com.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/marine_gps_app_for_android_without_internet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/goribuketide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006265.bin
698899be39c3a88cc7c7a1177ba98d77ef83b7bb4c652d818a8723df1280020e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 4808 bytes
font_01_sfnt_off000072c7.bin
9e4e4a5cd63ca7f275df268e13f7c10732ccb6565b33a8f54e0ed119f5c4bf7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 12936 bytes
font_02_sfnt_off00009c26.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C26 4324 bytes

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