Malicious PDF — malware analysis report

Static analysis result for SHA-256 74450f243c601e79…

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 23:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4373e88e96419a4999b9fcd72335c580 SHA-1: 7284967126fd12036c9124d2efc65c81e608526d SHA-256: 74450f243c601e794e98681300d8974400517fa06681bad3dcc31fc6c16dfed3
154 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.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to click on what appears to be a benign resource. The presence of numerous external PDF links further supports a link farm or redirection scheme. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=alphabet+colouring+sheets+pdf
    • http://files.prissyville.com/uploads/1/3/1/4/131407882/ruxuwif.pdf
    • http://files.stimulatingsciencesimulations.com/uploads/1/3/0/7/130740429/6fda5f5a.pdf
    • http://files.goddesschrissy.com/uploads/1/3/1/8/131856257/308955.pdf
    • http://files.practicalhomeplanning.com/uploads/1/3/1/8/131857305/6386313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/62948338500.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/mawozedasimubexezapod.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/78591386603.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/wafijizaveka.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/studio_one_3._5_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/jotenezogakasujeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0435/1354/4863/files/lei_simples_nacional_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2262/files/elicitation_and_collaboration.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/branches_of_educational_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8506/files/benyamin_aadujeevitham_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/bhagavad_gita_espaol.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_off00005e53.bin
fe19df3dff8ef716dab6bd1a7a745fa9fd758a057bab744604c90720d8aeed0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 5544 bytes
font_01_sfnt_off00007111.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 1800 bytes
font_02_sfnt_off0000799f.bin
47ced8c26c6f0c9dbcc61ea4a5a5cfec195553527638090a0a7db5498c2b5f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799F 10024 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.