Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b80dc538d000fe…

MALICIOUS

PDF

54.0 KB Created: 2020-08-04 03:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410f1450404d4bafb693e83651f7653e SHA-1: afcf3c140c4d072a7b9e3669b973bb8c230753c1 SHA-256: 11b80dc538d000fe094fb742a04ee977feeebc92be10a3e71ebd62e14aca5e07
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to 'total money makeover budget forms pdf'. This indicates a likely phishing or scam attempt. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. While no scripts were extracted, the presence of malicious links and the document's structure suggest it's designed to redirect users to potentially 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.ru/pify?keyword=total+money+makeover+budget+forms+pdf
    • http://files.yconnyi.org/uploads/1/3/0/8/130814353/kavojesolilelof.pdf
    • http://files.taylorelectricmt.com/uploads/1/3/0/8/130874627/2705052.pdf
    • http://files.agonyopera.com/uploads/1/3/1/3/131383953/zuwojoronofe_texizepujubop_tubofotuv_rorejegi.pdf
    • http://files.usczbusinessforum.com/uploads/1/3/1/3/131381450/e87f05.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/luxedavixuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/1851/7665/files/gezerub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/13992830275.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/zeluloletesanodezejerirod.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/vodixukuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/besuzapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9283/files/93215865915.pdf
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/zisinodekefoma.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/38634134074.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/cummins_onan_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/pidopinogi.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c5.bin
d0509f7a7c569bf19a9eb35a6e20af5f7baeb1cf551696e188c0a7c50a83ea08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 5676 bytes
font_01_sfnt_off00009704.bin
58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9704 6068 bytes
font_02_sfnt_off0000a6b5.bin
b344290586d8b26be7d8a40c89b9e9ecbcd15ef6889ac8512d797bbde83de427		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B5 10456 bytes

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