Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ce9db908965fa3…

MALICIOUS

PDF

41.2 KB Created: 2020-08-17 18:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 363f2f2354725d07e6d37c15401913e1 SHA-1: 21c4a79bf1ee2424f3cd970f726daea9163507d9 SHA-256: 75ce9db908965fa307e94d98b0088488822228db46f25cb5f8b1d30fe63834d6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting a phishing or redirection attempt. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new banking instructions. Although no scripts were extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.com/pify?keyword=earthquake+reports+near+me
    • http://files.thines-talks.co.uk/uploads/1/3/1/4/131408970/2096330.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/be_all_you_can_be_john_maxwell.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/radirevudutala.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/koxivifofatu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5842/files/mekejigemuzolelavagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/difepesokexoral.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/bugme_not_com.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/a_guide_to_mysql_pratt.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/11903710978.pdf
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/2017_vw_tiguan_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/design_of_wood_structures_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/gurenabujixolijumuvula.pdf
    • https://cdn.shopify.com/s/files/1/0434/0426/3580/files/57920514928.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_off000058f1.bin
1b90f28f852a60e185d382a9b75e3680c236ebfc6d9ff4073cb939917f06dbad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F1 5176 bytes
font_01_sfnt_off00006a65.bin
7613fa427dfcfc19de41b37e963061d6da2b798ef47bff21593d4e3839a3edc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A65 14896 bytes

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