Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d32b9d511d988d7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-09 21:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae04fc7c4350514d21e30b531990e855 SHA-1: b66a252a6d4a2ab999157b66da4200854d1a59e1 SHA-256: 5d32b9d511d988d773cdc08ed5a036724395ffa62322172888960a87c7245dea
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's part of a link farm. The primary malicious URL is https://ttraff.ru/pify?keyword=retiro+de+sonda+vesical+pdf, which likely serves as a lure to a phishing or malware distribution site.

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=retiro+de+sonda+vesical+pdf
    • http://bitofoge.estudiosdelaescritura.org/uploads/1/3/1/6/131606060/sibobinatufogadi.pdf
    • http://files.youngerman-art.com/uploads/1/3/0/7/130776632/foxosebewak-mokisoxu-pumufimumi-mirajomoduni.pdf
    • http://files.mywmspta.com/uploads/1/3/2/7/132712093/vobam-dufuxedibadoxi-bezimojo.pdf
    • http://files.texasaikidonetwork.com/uploads/1/3/1/4/131453214/modimupuw-pinusotose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/9918630837.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/luminarias_led_alumbrado_publico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/bitsat_previous_year_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/37083886179.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/48186058753.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/18463192422.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/govamurifiva.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/derivatives_calculus_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/49593465296.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669f.bin
201795ee302df789e5f363c703b2cf25dd6bd77bb2d2bebe092bcfd47770ae4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669F 5004 bytes
font_01_sfnt_off000077bf.bin
0f38f28e6de51ba3cfdda5a449c021e9ea11e23f55edd78c46f4003d097df63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BF 11084 bytes
font_02_sfnt_off00009c0f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0F 4324 bytes

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