Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bed32d43f2977f…

MALICIOUS

PDF

54.1 KB Created: 2020-09-01 01:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30357cc0ace2e438a6c2389052bed5e9 SHA-1: 1c232e93445de48f2a4c01acc91a83d5fc38dc4f SHA-256: 02bed32d43f2977fa6b076370d718b3be604d55325b902f583324f5ee61e996a
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=pediatric+helicobacter+pylori+infection+guidelines'. The document body, though heavily obfuscated, also contains this URL, indicating the primary malicious intent is to redirect users to potentially harmful content. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly suggest a phishing or malicious redirection attack.

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/wix?keyword=pediatric+helicobacter+pylori+infection+guidelines
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/wnr1000v2_dd-_wrt.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/how_to_identify_font_in.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/64546382434.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/51393874603.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/amrita_sher_gil_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/92348036329.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3031/files/tamil_movie_best_bgm_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5629/0206/files/characteristics_of_a_project_report_writing.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/41721271932.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/can_t_take_my_eyes_off_you_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/excel_list_worksheet_names_in_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/bepajasevebizoxasasi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2232/files/audit_assistant_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/29858854616.pdf
    • https://medlineplus.gov/helicobacterpyloriinfections.html
    • 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_off0000936c.bin
565f1e9b06eee524238cbc4de4de5e1a69c3676eb8e95a595bfae79f10adc6a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 5660 bytes
font_01_sfnt_off0000a6b1.bin
1c5ba5d526c70b3f4de85a46be1a7a468645885474f5dde85e89a859296a6331		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B1 10868 bytes

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