Malicious PDF — malware analysis report

Static analysis result for SHA-256 700d4fc3f49be47c…

MALICIOUS

PDF

43.1 KB Created: 2020-09-20 06:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0729736e90d3efd3dd632c63ff44334a SHA-1: e00f7ed9c96417581cac400a1b08372b00f88827 SHA-256: 700d4fc3f49be47cfddcdaebeb0e0c40098018f7c5608baaa29969c762e0e654
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.club/wix?keyword=role+of+education+as+a+social+institution'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent, likely to direct users to phishing or malware hosting sites. No scripts were extracted, but the structure suggests a malicious document intended for initial access via spearphishing.

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.club/wix?keyword=role+of+education+as+a+social+institution
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ef736e25-15c3-4f68-8f81-b52de043f3ef.filesusr.com/ugd/696b8a_f04e7e9e76a1477792303cec46617fbd.pdf?index=true
    • https://1b3192b0-34ed-426b-a2f2-9b1bf1c14785.filesusr.com/ugd/0b46e6_d4451f1cce6746a981b612b4a8b6a45d.pdf?index=true
    • https://469eb19a-9819-4075-be1c-722605d85167.filesusr.com/ugd/a2de88_5e595244c2ae4acfb8be1c2f5eb75eb7.pdf?index=true
    • https://0697488c-2d86-4af2-8081-4579b35c0dfa.filesusr.com/ugd/3e87bf_2202bd81433a46e2a1cb808baaa9f6c8.pdf?index=true
    • https://2668b604-f793-4b0a-a764-06b7428ca032.filesusr.com/ugd/76dd3d_73525b342e7c4bd78bf5019d0158279e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/mimude.pdf
    • https://cdn.shopify.com/s/files/1/0434/7140/5222/files/catabolismo_de_proteinas_bioquimica.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/81915638078.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/wenolosuxelusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0991/6576/files/cambridge_pet_speaking_exam.pdf
    • https://97769495-979a-4f3d-bcd2-838db70f7b7c.filesusr.com/ugd/5bb01c_68deada651c543429aaebe2cce7ce50e.pdf?index=true
    • https://6f1e3033-1b7f-442d-9b7b-d26e5d773efb.filesusr.com/ugd/b7306e_58d37207d1ce470fae9586447844a176.pdf?index=true
    • https://40ef9376-8aa0-455e-ad2b-ffa61b238ee0.filesusr.com/ugd/76aeb6_1ee1742ceba34ee687be75076692d3a9.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a79.bin
fd9343b2d4ef239b6659fec752f3b8c53ece0b811cc52cbb4e6a10d72edbbb2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 4928 bytes
font_01_sfnt_off00007b57.bin
6a2af8586bb3103aa2df050100e1bb2872f0c8d030e2ca632d6a4dec28f457ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B57 10472 bytes

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