Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21c38288d905edc…

MALICIOUS

PDF

94.2 KB Created: 2020-08-12 02:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8f8d309fe1b744156b358d416a0d91 SHA-1: ffe10ccaa9fa8e27c74e87a6fede74149ae33277 SHA-256: c21c38288d905edcac06f0063674246873133913464abb7ba4406cdd3a6f8d94
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'. The document body, though heavily obfuscated, contains a reconstructed URL that matches this redirector. This indicates the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=the+augustan+age+in+english+literature+pdf
    • http://files.luthanealadams.com/uploads/1/3/0/7/130775180/mimexozape.pdf
    • http://files.acousticecology.com.au/uploads/1/3/0/7/130775701/magime.pdf
    • http://files.markbrandi.com/uploads/1/3/1/6/131606605/43731.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/86077876720.pdf
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/25047945041.pdf
    • https://cdn.shopify.com/s/files/1/0452/5346/0130/files/madinah_arabic_reader_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/zisixumewojiju.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/wenuvuxuxavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/british_english_conversation.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/rudepalijawuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/7178/9470/files/minecraft_decoration_mod.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/81015304856.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/kebufevigixotuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7347/8560/files/gemupukizivubaxal.pdf
    • https://cdn.shopify.com/s/files/1/0436/4288/0160/files/kukotonozetofebixutaki.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/59428678613.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_off000129ba.bin
2b792b3ff70eef932f5875da24a2806463efc017b2f1b02baae64036d8c07853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129BA 5024 bytes
font_01_sfnt_off00013abc.bin
c36017c20a1dbabc2fe4ef8993a8cdc198185299793ba7493331cff946e00af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABC 10120 bytes
font_02_sfnt_off00015d66.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D66 4324 bytes

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