Malicious PDF — malware analysis report

Static analysis result for SHA-256 e910f64924362a1e…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 14:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9371726ebf0baad7478658f695bc0c4 SHA-1: d097b48485b6fd86b7128aae88c8504fd580ceec SHA-256: e910f64924362a1ed2349d7ae27defe249cb74dcbce903feb42b0e7238c270ba
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates a malicious redirector link, and another identifies a PDF link farm. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://ttraff.ru/pify?keyword=epidemiologia+veterinaria+para+concursos+pdf, which likely serves as a redirector to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=epidemiologia+veterinaria+para+concursos+pdf
    • http://bejaf.thegardenpeople.org/uploads/1/3/0/7/130774978/kibor_bisemir_totej.pdf
    • http://vinin.artentwined.com/uploads/1/3/0/7/130775475/6596465.pdf
    • http://files.mrhibbert.com/uploads/1/3/1/4/131453615/b7c393.pdf
    • http://jupol.chisagocountyfair.org/uploads/1/3/1/6/131636725/f32cf2d.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/niwotomazegavufazosi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/xepuvaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/85180778496.pdf
    • https://cdn.shopify.com/s/files/1/0429/4325/0588/files/renijixatobunigezem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/wopuziditiro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/19172749874.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/73813851553.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/light_grey_color_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8167/files/78424607279.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/cahier_de_charge_pour_site_web.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/nimefeloxanumupoxejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6262/4405/files/maria_montessori_education_and_learning_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/59889523840.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/xixegib.pdf
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/felis.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af8.bin
76282d114f2106ef88fbb963dfd09bdd1f7c1710a43caed26ea49f2a004dd66c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF8 5376 bytes
font_01_sfnt_off00007d36.bin
6ffd820526d9dd17bd7a38ae2be82ed71230c593e7330ccb2f48739be500c34f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D36 11800 bytes
font_02_sfnt_off0000a387.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA387 4324 bytes