Malicious PDF — malware analysis report

Static analysis result for SHA-256 190ed50124369dab…

MALICIOUS

PDF

47.4 KB Created: 2020-08-16 12:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d33d856a2506b79a2d0b28f05b115d SHA-1: 2144a6bc15ed7dfe4d0ed8678c42cac4b9da75ca SHA-256: 190ed50124369dab203dd3a4424371bfaa10dbdc1afc2c1a09f25c1a79386689
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting an attempt to disguise the malicious destination. The presence of numerous links to external PDFs, including benign ones on Shopify, indicates a link farm or SEO manipulation tactic to increase visibility and traffic to the malicious redirector.

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=abdominal+pregnancy+radiology+case+report
    • http://files.amandamelissa.co/uploads/1/3/0/7/130776828/1818115.pdf
    • http://gewapedo.woozeyacresllc.com/uploads/1/3/2/3/132303382/c4e85a84492447.pdf
    • http://files.paiboon.biz/uploads/1/3/1/4/131406762/1208977.pdf
    • http://mazerudi.sethtylerblackartist.com/uploads/1/3/0/7/130775075/jokasuxuwedafimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/31364408794.pdf
    • https://cdn.shopify.com/s/files/1/0439/2566/7995/files/gramatica_comentada_adriana_figueiredo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/30095744269.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/28022477462.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/bronkitis_pdpi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/82664358738.pdf
    • https://cdn.shopify.com/s/files/1/0436/7941/6473/files/python_convert_bytes_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/55064784997.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/muatan_gaya_dan_medan_listrik.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/vunanemidadebi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/how_to_underline_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/rrb_ntpc_cen_01_2020.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_off000079fd.bin
4233a61d3174e255072e7b716d4dd0c4a70b63935254b5422bebb1530e293221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 5624 bytes
font_01_sfnt_off00008d01.bin
498207487ff981e9c0ccff7f1df2fe92f48034dab8ec69a8052a2244ae1def1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D01 10496 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.