Malicious PDF — malware analysis report

Static analysis result for SHA-256 66864f0d2a0fd60f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-22 04:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5500523796b4c4c206d7a7d4e54c0d6f SHA-1: 2ad6794e388a41c99448bdb66deb5ad2b3665f1a SHA-256: 66864f0d2a0fd60f16df23134b49b484025bcf79d5a6f91df0f47a947ecfb916
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify but point to potentially malicious content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics.

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=consumer+reports+best+electric+pressure+washers
    • http://mezelojod.emeraldleaf.ca/uploads/1/3/0/7/130740164/7300801.pdf
    • http://modelaw.rosemarysgardenhouston.com/uploads/1/3/0/8/130814328/pudikenakowijizikas.pdf
    • http://files.kcwes.com/uploads/1/3/0/7/130739758/walugigob_zekej.pdf
    • http://files.stwilliamparishwigan.org/uploads/1/3/0/7/130775115/sivurolugabukizut.pdf
    • http://files.handyme1.com/uploads/1/3/2/6/132695418/6993cda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/5266/0901/files/resowukebunododabapos.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/kesateboxorozuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/47112683546.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/3421527410.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/filosofo_tales_de_mileto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/dosulelijefiki.pdf
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/73835105108.pdf
    • https://cdn.shopify.com/s/files/1/0435/4755/8037/files/alimentos_sin_carbohidratos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/36441730157.pdf
    • https://cdn.shopify.com/s/files/1/0444/1541/8534/files/english_story_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/fewoxorimefiwiverefizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007080.bin
e757710d40f1bcf9e8e38f97293f583b087bdc456d580732a15d5016b7b19986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 5308 bytes
font_01_sfnt_off00008266.bin
14b5c0fbec48fa016593e230769d522a95a8284e22a77c221e66c62002d9536b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 10268 bytes
font_02_sfnt_off0000a599.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA599 4324 bytes

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