Malicious PDF — malware analysis report

Static analysis result for SHA-256 643f74634e8acf6a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 08:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 309e33a2454be57a5d6116781ca76208 SHA-1: 03abbff2385a1e2dddf32a8260960e8c7fd46b18 SHA-256: 643f74634e8acf6abd812f926db2b11c0dd8ed59a84e80286f0bb8fe0ca1f0c6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to mimic legitimate educational resources. One prominent link, 'https://ttraff.cc/pify?keyword=irrigation+and+water+power+engineering+textbook+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution, under the guise of providing a textbook.

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.cc/pify?keyword=irrigation+and+water+power+engineering+textbook+pdf
    • http://files.pannypointcondo.com/uploads/1/3/0/9/130969925/ragonugoderaputiga.pdf
    • http://files.theoldeschoolhouse.com/uploads/1/3/2/7/132741302/bixetekafomunuvaxuk.pdf
    • http://files.westtexascremation.com/uploads/1/3/0/7/130776211/6183028.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/lizuluzikuwino.pdf
    • https://cdn.shopify.com/s/files/1/0430/5957/6986/files/business_studies_grade_10_essays_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/13165682581.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/91360851500.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/babowosikiteze.pdf
    • https://cdn.shopify.com/s/files/1/0429/0917/1879/files/56452007234.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/rigosavegoketefugebikivub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/25458095052.pdf
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/architectural_working_drawings_residential.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/direzulizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/29004598833.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_off00005b11.bin
1484d523bb51b3df8fc2a47d3334b18532b2733d8f7a35757119435f48d01f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 5300 bytes
font_01_sfnt_off00006d38.bin
89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 2116 bytes
font_02_sfnt_off00007704.bin
554cc245e440f89cbc4d18644b8496dad1e04911f44b2cfb14232041f70f5353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 14992 bytes

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