Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4df65c71ef65592…

MALICIOUS

PDF

55.8 KB Created: 2020-08-15 00:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd067758ebf6fa84ffd0791b7ab52e24 SHA-1: deecdc38df14b127fa41e031dc0d67117ba55cc1 SHA-256: b4df65c71ef655924643d5f19602632afc394cf10e0a29becddec1c13edec07b
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com' which is associated with malicious activity. The document body and embedded links suggest a lure for a dictionary app, likely to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the PDF structure with multiple external links points to a link farm or redirection strategy.

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=english+to+bangla+dictionary+apps+free
    • http://didoji.mashamhistory.com/uploads/1/3/0/7/130738797/jepeluti-muzezeni.pdf
    • http://files.wexforddanville.com/uploads/1/3/0/8/130874067/752141c.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/bodigerejave.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/87321889026.pdf
    • https://cdn.shopify.com/s/files/1/0431/2825/8726/files/baitul_muqaddas_history_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/dudufej.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/document_analysis_method_of_data_collection.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/zenenofigenexuwamelopudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/4830182733.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/canon_eos_800d_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/sobakiditabokafadazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/icici_bank_mudra_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/giwidezitesajawobeniwodak.pdf
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/duzupitunewanopez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006983.bin
4d8ebc05c34eb02f5c12a6502c7e46eea924e390561c9373f1aadb9fab644d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6983 5616 bytes
font_01_sfnt_off00007c96.bin
54baab59575ee23ae36aac04966b9f719ba512d6c3c0feb2b6278eb516091e7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 6128 bytes
font_02_sfnt_off00009032.bin
5ea229e5afbc6e6f2bcf37d6f62ae24531045fe4388bdf0c8dabed01c53404fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9032 14216 bytes
font_03_sfnt_off0000bcd2.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD2 16092 bytes

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