Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d775b2202215b9…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 20:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d5e76434ddfd5249bc010033ef1732 SHA-1: 37008f819bd03b047ca218984a7c0b996808b405 SHA-256: e0d775b2202215b921e9816e0f005942177cce4d8bb90897d67cc1c02ab1c0ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=breathing+exercise+for+stress+pdf, which likely serves as a lure to download further malicious content. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=breathing+exercise+for+stress+pdf
    • http://files.myelevateshop.com/uploads/1/3/2/6/132695535/5a37a90369.pdf
    • http://files.goactivelife.com/uploads/1/3/2/6/132681660/7842714.pdf
    • http://files.helennewsomeart.com/uploads/1/3/0/8/130874612/tiburonalemivu-vasabepi-biraxagufe.pdf
    • http://favera.suggsworldonline.com/uploads/1/3/1/3/131381204/65aa9a.pdf
    • http://files.myactionfigurecustoms.com/uploads/1/3/0/7/130776298/kozudumipo_lejebu_winotijo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/16217718649.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/12742794044.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/refobivaxuxuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9883/9970/files/vunokesupitajotutipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/50_tons_de_cinza_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/alif_novel_episode_1_complete_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/63683988244.pdf
    • https://cdn.shopify.com/s/files/1/0436/5792/0677/files/name_the_continents.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39738284996.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/47406416619.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/gakeponatujum.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006726.bin
e4f138dc4dc3e54da788f36432937479a9ad599d908872de5bc264e68b51b17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 5504 bytes
font_01_sfnt_off000079e3.bin
cc912e47fef1c8f8a2004761faff7d3c1f8899b87619039e76d10022b861ceaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E3 9760 bytes

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