Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ea06bdcb012d49…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 15:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a265ac88190688c5d548d5df84037839 SHA-1: f4059afea7d50b51acf7b1c44516f354e9b431c7 SHA-256: 21ea06bdcb012d49ca4cfc1dce12fd696a111cd1feb873694f26007c0dfc21b4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=physical+science+grade+11+mechanics+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing academic content. No scripts were extracted from this sample.

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=physical+science+grade+11+mechanics+pdf
    • http://files.thevillasatpleasantvalley.com/uploads/1/3/1/8/131856173/10b65321d8.pdf
    • http://tiwajaj.otterhounduniversity.com/uploads/1/3/2/7/132740720/dasam.pdf
    • http://rusaxup.baldwinhillselementaryschool.com/uploads/1/3/0/9/130969754/a3864a3b2ef8b98.pdf
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/best_risk_management_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/action_potential_of_cardiac_muscle_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/77740766593.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/d_d_complete_scoundrel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/catalogue_sacem_transformateur.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/free_download_tailoring_books_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/dolevilofagitojudugin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/58209404301.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/marasmus_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/lopobufusasiwisubigun.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/87499212577.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/betapuvutuguwiwobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/xilowuxaxevul.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_off00005b8c.bin
58c4f572b631aa41df822f0b6f6fc861d47c64003876ef5afdcbd425b61f0361
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8C 5320 bytes
font_01_sfnt_off00006d63.bin
fa86f80a40f3e380ea6b1c043a5b901fd3701beebf831e9ad270d5d047e771df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D63 9932 bytes
font_02_sfnt_off00008f55.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F55 4324 bytes