Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54177315fa58dfa…

MALICIOUS

PDF

36.3 KB Created: 2020-09-11 10:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d99cbf66e405edbd39cc3ce546d62347 SHA-1: 999685d9a9335bab1b23bd7ec8dcf530b8e2ca1a SHA-256: d54177315fa58dfa5ddf97bf0db5dc1cb164a3d3fb2d4d4aae451d08688deac1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links redirects to a known malicious infrastructure, indicating a phishing or malicious content distribution attempt. The document body itself contains the same redirector URL and a list of other PDF links, suggesting a link farm or redirection scheme designed to lead users to malicious 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.link/pify?keyword=aasma+ko+fir+jamise+dj+ringtone In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/learning_strategies_for_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/fegerodoloj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/apa_style_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2606/1224/files/fowijenow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/multiplying_binomials_foil_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/second_great_grand_uncle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/laluditafidufedisatovijex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/netaradadimonubadefixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/mivasanefolegemaruwuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/80488082459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/anatomical_terms_quiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/fizazesifamifakurujo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b9801a_570d95eae4f54f48a6f77cd3df062ac0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e9e2f_aa5f48ef6162440a9697ea9f106dbbbf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/95bb70_05bba37290ae4d6f974b27992ce08e4d.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FC 5112 bytes
SHA-256: 8dc25698d5bc9610858decbcd0bfcf11ac22cf978a15008cb076c61b262e9ad9
font_01_sfnt_off0000554c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554C 9676 bytes
SHA-256: 2a0b41ee2daf6a7678709e06edf292f0a4157152aa34d859664ba48bd7ea600e
font_02_sfnt_off0000763e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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