Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eaad4a3ee6fd9f0…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 12:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98e774e2c8dc9457b8f757e59aca1b4f SHA-1: 259c56049a346fad5fe84c08c054a86e0b29d52f SHA-256: 1eaad4a3ee6fd9f06678a7f9ae30eb1ff71914f35d30248028d744a389314ec0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains with book-related slugs, suggesting an SEO poisoning attempt. One critical link redirects to 'ttraff.ru', a known malicious redirector. The document body, though heavily obfuscated, contains the same book title and the malicious redirector URL, reinforcing the lure. No scripts were extracted, but the primary attack vector is the malicious redirection link.

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=uncle+tom+s+cabin+by+harriet+beecher+stowe+pdf
    • http://files.crystalconnections.co.uk/uploads/1/3/1/6/131607005/tudalek.pdf
    • http://jedovupe.domehouselakes.co.uk/uploads/1/3/0/9/130969332/1068446.pdf
    • http://files.lightindarknessohr.org/uploads/1/3/0/7/130776031/bbf2df8.pdf
    • http://files.onestepborders.com/uploads/1/3/1/0/131070912/4561693.pdf
    • http://files.onslowanglicans.co.nz/uploads/1/3/1/4/131454352/gigifolizenenabego.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/sawagajis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/dinesh_biology_book_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/5678118686.pdf
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/mifibapibekifeniwatolafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/8939683427.pdf
    • https://cdn.shopify.com/s/files/1/0433/3223/9528/files/accounting_ratios_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/biralilelunaresozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/punidawokojawixomi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/cambridge_fce_listening.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/adjective_order_activities.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2456/files/78566759809.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/araucaria_angustifolia_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5029/5708/files/managerial_economics_mark_hirschey_12th_edition.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_off00006b93.bin
e01c43f9707534792ce2ba24d3d8642d237d4fb38374b80b2a601d7f3cabef7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 5720 bytes
font_01_sfnt_off00007ef1.bin
5e5e188ce4d49f034413d25dbbe71a3e1b85eefa9046f1c9746bd82b62faec35
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 14360 bytes