Malicious PDF — malware analysis report

Static analysis result for SHA-256 5072ead33dd09c20…

MALICIOUS

PDF

52.1 KB Created: 2020-08-11 20:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94f088bdd6f2f41f452383c63612a09 SHA-1: 58cf1793add2a6eeedba5855cf1a52bbac53ccfd SHA-256: 5072ead33dd09c202bee763ac50acd4c27b07c8bfff7339e5afce4fe7b9d7319
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector at 'https://ttraff.ru/pify?keyword=investment+banking+activities+pdf'. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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=investment+banking+activities+pdf
    • http://files.ilonayoga.com/uploads/1/3/2/6/132681456/zibumimefedugavorisa.pdf
    • http://files.sarahiebert.com/uploads/1/3/0/7/130740465/3119299.pdf
    • http://files.audubonparkchurch.com/uploads/1/3/2/6/132682787/jasamijopixubonuko.pdf
    • http://files.sharptravelplanners.com/uploads/1/3/2/7/132740480/4b6e262221c3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/godoworezilapulazekamuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/beowulf_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8536/files/zogilelozaporutebenalet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/damodaran_investment_valuation_3rd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3248/5799/files/zepub.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/72821564761.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/podigetimipoximut.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/sedacion_para_cardioversion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/alquran_terjemahan_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/firinaruve.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/najanoxotukuzipavegajeso.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ce0.bin
a0ed33c06fdd9ab23dd73fc8d5eb57e0be8d3b7a487f903953c54738c9e58e60
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE0 5548 bytes
font_01_sfnt_off00009fac.bin
5b102d7d68fbc59cb4278839a6c5d95e10a722090410d05bbcc33676b06a1b96
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAC 10472 bytes