Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d7e909670eb371…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 05:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b298ebde5d6703f9430ee2a4b3840c4 SHA-1: 27f366e58ecc1f9fcc5311c0d3d4c31703e898ab SHA-256: 69d7e909670eb37101cf6e1b470701ee9be5bf611bd6615c8c4da5c9f2b02e64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and several other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely used to redirect the user to a further stage of the attack.

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=best+laundry+detergent+for+bamboo+sheets
    • http://jowuwo.iancleggwalsh.net/uploads/1/3/0/7/130738914/4567dc756f6d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/57829027407.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/lewofigun.pdf
    • https://cdn.shopify.com/s/files/1/0440/9566/8376/files/risk_management_finance.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/19828281962.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7047/files/o_catecismo_da_igreja_catlica.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/netogoxus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2632/4383/files/inelastic_collision_worksheet_physics_classroom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/pathophysiology_of_birth_asphyxia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/accounting_basics_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/3355/8168/files/vebekubi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633a.bin
b50dadf556925b0a66c34034b427f96100d145899a66ba7c72d1ad29686841cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 5612 bytes
font_01_sfnt_off00007627.bin
cafa76d6e637b5dcf1f875ea9aac1240ecdfa2b2bb12f52aac3117854ce35471
pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 9884 bytes