Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35c44b85a3a932a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 16:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89bc01562088d005e038300eba992bb4 SHA-1: 73139e917336d6b7ddc160e42241f8cf507e9cf0 SHA-256: d35c44b85a3a932a5b147d2e33551de6f4130e024ceaf7a276957502abd5a889
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM indicates a large number of embedded links, with the primary malicious URL being ttraff.ru. The document body, though heavily obfuscated, contains the malicious URL and a reference to a benign-looking PDF title, suggesting a lure.

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=pdf+bohemian+rhapsody+piano
    • http://files.elevatedalignment.net/uploads/1/3/0/7/130739069/4489904.pdf
    • http://files.thesownseed.com/uploads/1/3/0/9/130969742/nofenijul-joluzasekopu.pdf
    • http://files.theshadowagency.com/uploads/1/3/0/7/130738720/totazuropaxo_binenar_vivowukugosi.pdf
    • http://files.theshadowagency.com/uploads/1/3/0/7/130738720/t
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/statistical_analysis_with_missing_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/20890848926.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/optical_isomerism_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/fios_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74195332560.pdf
    • https://cdn.shopify.com/s/files/1/0452/8213/2130/files/factoring_quadratic_trinomials_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/57161155654.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/49726795841.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/jujutifefiforedin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/semefajovigukuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/laporan_pendahuluan_bronkopneumonia_pada_orang_dewasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/45443010784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/ccd_owner_letter.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_off00006a11.bin
2361717c6624fdd8e7f5488f64ebb9bc7fb2189a1cc0d70081a96dd57966af65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A11 5492 bytes
font_01_sfnt_off00007c9b.bin
6dc75e052472bbaaf6819f78ee70a0c540a292c54be3c276ab4a835a6d5ce6b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9B 10060 bytes

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