Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d023c491093c47b…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 15:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc06e4127fa7b7ca209576b5f837664 SHA-1: 75e00c3630622f1994722cdceaa891a57fa47320 SHA-256: 9d023c491093c47bf7944437b833f8291c3897f389a3cca7b34b66d9f9c4db6a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=oecd+beps+final+reports+pdf', is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious sites under the guise of providing research reports. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=oecd+beps+final+reports+pdf
    • http://files.melon-days.com/uploads/1/3/1/8/131871692/24a2b7ba3.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/momevome.pdf
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/magevidamumekerukapono.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/23099404271.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/advanced_data_structures_and_algorithm_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/sugetevoxibokidasim.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/cadbury_annual_report_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/55726717379.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/8437934840.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/51264035101.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/cents_symbol_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.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_off000070c7.bin
abc5e630bd749da8cb4f4af78cf417e003677cffe583614b5447153a7312066a
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 5316 bytes
font_01_sfnt_off000082d6.bin
8a2ea09e632313b953a41b9d555cbcff622a3ed8e5d78432a792ceee4d7d0ff5
pdf-font-stream PDF embedded font (sfnt) at offset 0x82D6 10824 bytes