Malicious PDF — malware analysis report

Static analysis result for SHA-256 04070e6035fad5aa…

MALICIOUS

PDF

44.5 KB Created: 2020-08-17 09:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75aa658ffd04555afd5d038c81c1cad8 SHA-1: d03dc8d65e3a012084867d509f913215304eb3e5 SHA-256: 04070e6035fad5aa432a586f616752cc25ac5b8e39de2704aad762caaf45cce3
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, many pointing to Shopify-hosted PDFs, which is a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vidmate++2017+wala
    • http://files.nigerianfamily.org/uploads/1/3/1/4/131453684/0c7d0a4.pdf
    • http://rezegufa.livingcanvasmedia.com/uploads/1/3/1/6/131636761/4526609.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/bujasovogofomaguwux.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/zikukubuguwakener.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/vocabulaire_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/sign_document_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/statistical_inference_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/power_word_blind.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/ayatul_kursi_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0449/8125/6360/files/12499771168.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6117/files/36269099690.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/71694601226.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_off00006708.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 2952 bytes
font_01_sfnt_off00007196.bin
58c44cb7dae268b7ad190b6be88aaa9294288ea41f43c576c04bf018386da4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7196 5160 bytes
font_02_sfnt_off00008332.bin
07dcd7baa12be91e967a2a96ab4ddf2666ef3debeaf661bd8bcb695e56f1d158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 10056 bytes

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