Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eba509f753f4790…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 23:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deffdf8a64a23c86a5ea50d738fddd22 SHA-1: c4c77409676f6d849ef725f6d3a79c8d99a258c2 SHA-256: 6eba509f753f4790a8853a4f6d06ac728b83f826d6011ec9ff7228a75932f2ca
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=fixing+corrugated+bitumen+roofing+sheets'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but one is a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it.

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=fixing+corrugated+bitumen+roofing+sheets
    • http://files.visuograf.com/uploads/1/3/1/3/131381679/nifudolofewaxu-ziburulipujo.pdf
    • http://files.yinghsuehchen.com/uploads/1/3/0/8/130815095/48d8efdb.pdf
    • http://files.rosypetrova.online/uploads/1/3/1/8/131856649/lafexipuxivesexewoxi.pdf
    • http://files.wilsonramband.com/uploads/1/3/1/3/131383943/028e7d138b1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/54992834764.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/introduction_to_calculus_and_analysis_vol_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/7660/7390/files/provinsi_banten_dalam_angka_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/87482019767.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/brown_sequard_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/682885368.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/39574853849.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/first_law_of_thermodynamics_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/american_english_file_1_second_edition_workbook_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/basic_english_grammar_free_download_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/vetis.pdf
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/attachment_report_writing.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/kelidow.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_off000066f0.bin
ac037c652ed38d8959a8cc543bfafb3d6d6664c67842a60818290c98a6cf1ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 5564 bytes
font_01_sfnt_off000079b2.bin
f59573ec776cd8240e339c2ba9b15f7bff01b51e8f33cfe33971b553f091ec03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 9988 bytes

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