Malicious PDF — malware analysis report

Static analysis result for SHA-256 6332591df434a442…

MALICIOUS

PDF

42.5 KB Created: 2020-08-25 01:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0be260cb3606986e6642ad35169c7de SHA-1: abe53251c824db25ab25154bdfbab671d452bced SHA-256: 6332591df434a4426ba7c6ac37c6eee5f8200a3a6354baaeae7c5904cf55b9ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body and embedded URLs suggest a lure related to performance or contact information, further supporting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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=ames+performance+phone+number
    • http://files.melanielynnen.com/uploads/1/3/1/6/131607374/6324783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/6883830961.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/funixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/career_development_interventions_in_the_21st_century_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/tefokodanuteburumak.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/real_blood_cancer_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/7806962092.pdf
    • https://cdn.shopify.com/s/files/1/0434/1510/9797/files/computer_networks_and_internets.pdf
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/37623946865.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/20850742699.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/81853346423.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/ginejofunaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/dc_library_overdrive.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_off0000683f.bin
d6f7e3a74c366af2a301ccd45bb5a72a5b8f4f4171dccf64df06dc989736fa93
pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5352 bytes
font_01_sfnt_off00007a3d.bin
fb92199ef34a6353e43ae54a59c2eb69784e8f8e307358ecccd55a5a6c87730f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3D 10364 bytes