Malicious PDF — malware analysis report

Static analysis result for SHA-256 5753177e9b898b55…

MALICIOUS

PDF

46.4 KB Created: 2020-08-04 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04b500d0dfbec49e26f4f86c901b2165 SHA-1: 568606b799955c9e081c635af214d4054b52e7c8 SHA-256: 5753177e9b898b55e39cf522a54cff2545612e39f452ec512f4decf7ec5bac61
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.cc/pify?keyword=diccionario+de+la+real+academia+espa%25C3%25B1ola+de+la+lengua+pdf, which is likely part of a phishing or social engineering campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=diccionario+de+la+real+academia+espa%25C3%25B1ola+de+la+lengua+pdf
    • http://files.rimrockmanagement.biz/uploads/1/3/2/7/132740501/lagusazuxujo_kedip_nexozi.pdf
    • http://files.yonemoto.com/uploads/1/3/1/4/131453897/545605.pdf
    • http://files.rubylightportraits.com/uploads/1/3/1/1/131163761/3958076.pdf
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/99398919402.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0078/9154/files/kitegawerabonixeku.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/84186891084.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/davijikejokuwajipivozid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/7840417008.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/4th_grade_math_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/59869924542.pdf
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/katumetabeleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/zilevakuwasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/20320244160.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4031/files/suwitupewukujexob.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_off0000723b.bin
67b144e7ab580ba8d5732c303a1684c789e4b6c299e3cb6d8134dec81d9de01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 5684 bytes
font_01_sfnt_off0000853f.bin
4a7d6048b68c68424ff5bd9b3e763d0db0f065af65505e557b50352ba4ecd6af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853F 11236 bytes

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