Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ad5ed0ecad569b…

MALICIOUS

PDF

38.4 KB Created: 2020-08-17 18:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20db864529b839b45616787ca0b92a0 SHA-1: 2f04fc18a6ed6333ba0173b50a0461f5123f04ba SHA-256: 34ad5ed0ecad569b3a85ab40ea5d5a582183732cf302054b900c2de85e42b1ca
150 Risk Score

Malware Insights

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

The PDF contains a link disguised as "Croydon council building control forms" that redirects to malicious infrastructure at ttraff.ru. The document also contains a large number of links to PDFs hosted on cdn.shopify.com, likely for SEO poisoning or to appear legitimate. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a malicious redirector was employed.

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=croydon+council+building+control+forms
    • http://xofewide.bayareagraphicartist.com/uploads/1/3/0/9/130969723/wutimig.pdf
    • http://teludij.evolutionrattery.com/uploads/1/3/1/0/131070450/3267941.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4812/files/anatomy_of_heart_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6290/9335/files/80541637549.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/lekuzitozizojisulebudilok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/25783149089.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2100/files/kejumen.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/rofuweluloz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/hcl_technical_support_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/attendance_register_format_with_time.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/97666531642.pdf
    • https://cdn.shopify.com/s/files/1/0448/0807/7473/files/disadvantages_of_computerized_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0451/0354/6533/files/cuando_se_cae_el_cordon_umbilical.pdf
    • https://cdn.shopify.com/s/files/1/0440/0008/4126/files/bijijifonuvoza.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_off000057e7.bin
8c2afda194a5a1d85614bf21b0aa664783fe6c70bf6fbfa0e431b31d80bffd6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E7 5276 bytes
font_01_sfnt_off000069cd.bin
efa550ded9f224d6456eed55b5dec751ec828ef66b37c8101263929b99be2a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CD 10156 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.