Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe2cbac6ed0cdd0…

MALICIOUS

PDF

53.8 KB Created: 2020-08-12 06:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 191f54d720c9dfa040b63a27c89b69ba SHA-1: f290cf17ce417b1cf56a99c3fc4260f5fc15d595 SHA-256: ffe2cbac6ed0cdd03e0729ee7dbe96fabd7c1b908d0a5c50d9909c0f56bfaab4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Puisi adalah pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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.com/pify?keyword=puisi+adalah+pdf
    • http://files.pqh.com/uploads/1/3/0/7/130739684/limudo-ranuro-majesakobo.pdf
    • http://files.tracyvillagefc.com/uploads/1/3/2/6/132681602/gumijitanumagaret.pdf
    • http://zoxawu.sbdumpsterrental.com/uploads/1/3/1/3/131383791/gizuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6135/files/muzasedaxubakanopiwurotus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0436/9278/5818/files/unit_6_test_study_guide_similar_triangles.pdf
    • https://cdn.shopify.com/s/files/1/0440/0853/8262/files/64833969905.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/67383066849.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/11967832203.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/50654495376.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/89797660113.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4413/files/zabunowabususolaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/96163337464.pdf
    • https://cdn.shopify.com/s/files/1/0449/4213/1355/files/10_class_math_solution_book.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_off00008d9e.bin
a948d17887e66ecdc5f130913a8ca4b4b661a1a4d4fffb55dab33611187f5857
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9E 5032 bytes
font_01_sfnt_off00009eb7.bin
cc86d8765c2e86eec63e8e93fcaa03ca7925a7f13ac15bac105fd0c772026aa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB7 13936 bytes