Malicious PDF — malware analysis report

Static analysis result for SHA-256 00eef03c8120d8e6…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 01:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 871b546246b09fd97f9ffdafbae9dce7 SHA-1: 57e745ab17c86875a75eec36512db241e66558bf SHA-256: 00eef03c8120d8e66e27076fc7828cecce7defc4d1ced79344bfdf399f02701d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or distribution mechanism. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body contains obfuscated text and embedded URLs, further supporting the malicious nature of the file.

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=calculus+derivatives+examples+and+solutions+pdf
    • http://files.usaboxingmetro.com/uploads/1/3/0/8/130874422/3689492.pdf
    • http://wixiji.wildlifeinfo.ca/uploads/1/3/2/7/132741099/mexulu.pdf
    • http://files.designsbycarolann.com/uploads/1/3/0/8/130814513/ac27058e6e8.pdf
    • http://files.amandamariegatton.com/uploads/1/3/0/8/130813859/dufitexerasezukamozo.pdf
    • http://files.shawtyreservices.com/uploads/1/3/1/4/131452938/9000144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/zumevubopowixoxopudikis.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/assessing_student_learning_outcomes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/belajar_adobe_premiere_pro_cc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/totozovuwazux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/52523304030.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/ensayo_del_libro_aura.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/sopefesewekazapikek.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/allis_chalmers_forklift.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/vuputetoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/number_2_worksheets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005daf.bin
5ffbb23853455266ba6a9b3b0ab227faa1a6c0c24b40615158e2f9567e7f6e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 5336 bytes
font_01_sfnt_off00006fbf.bin
67000b8f79ef4be2a364d954105265976dd204e157dc667f41d0cb84ec8824e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 13732 bytes