Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82b390ec240e1cd…

MALICIOUS

PDF

45.2 KB Created: 2020-08-18 17:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718b25a93aa5e4a08248dafb9bc94dd3 SHA-1: f134e8012fdaa56d7db7e8bb6d28570623544270 SHA-256: d82b390ec240e1cd9aa5507974f6ff931e7c3ba5d57ac1d8dc41eda5154a84eb
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=debit+note+template+doc', suggesting a lure related to financial documents. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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.com/pify?keyword=debit+note+template+doc
    • http://files.janeantonovich.com/uploads/1/3/0/7/130775659/0a085b.pdf
    • http://files.tlcgardensandcrafts.com/uploads/1/3/1/8/131871494/savirudirezazazani.pdf
    • http://sudujuw.tilcc.com/uploads/1/3/1/4/131407005/5fadeef.pdf
    • http://files.thelowchenclubofamerica.org/uploads/1/3/1/1/131163904/mademogego-subenita-gurubi-kunukesedoli.pdf
    • http://files.delaneyswiftart.com/uploads/1/3/0/7/130740069/bifusazijizodupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/jepuvarumimeduluf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/jozedaxazasiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/business_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/solaire_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/92045830996.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4063/files/medical_case_study_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6421/files/36596479089.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/81365567384.pdf
    • https://cdn.shopify.com/s/files/1/0430/3516/4835/files/gemunevidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/31748859894.pdf
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/bharat_acharya_microprocessor_free_download.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_off00007467.bin
b91591dbf3f1ca132af2722331080d247f0564bbf707829c47c8dfa30920127c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7467 5084 bytes
font_01_sfnt_off00008595.bin
01604f335502bf2cf8ddcfe88988d08e42c1341b52d747f7231db312133c41a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 10120 bytes

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