Malicious PDF — malware analysis report

Static analysis result for SHA-256 627c987f951ec364…

MALICIOUS

PDF

52.4 KB Created: 2020-10-16 15:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4d025a6573820e8509b1dc79582c920f SHA-1: f2c8b88a641be93675cc4e94a8c60be73634430c SHA-256: 627c987f951ec364df32f6512b5d0057847a83b48775ac14e555d3b06d957e66
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution.

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.
  • 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://gettraff.ru/pify?keyword=stereotype+and+prejudice+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f8748ca991b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f88732f43b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f877eaa3a70e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f888684735a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f87493142f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f870f18a5051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f89243c39c42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/zozeterudijumokitukax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6845/9681/files/woods_50013_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8586/6167/files/educational_psychology_theory_and_practice_slavin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1054/1726/files/ovpn_android_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7700/0611/files/nj_transit_train_schedule_pascack_valley_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b683846d-c170-4a46-93f3-4d3d3066c0fe/92475337045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9640a074-3635-4eef-a641-1c95099b87cf/24896205344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80798db4-c49b-43ab-9167-cf415feb7d23/wulujirosup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6faec43c-a015-4404-8ae6-4e2a50bd5f6d/tepibajewiwudageraporas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f726a0f-3edd-44e9-8de2-a42ee50bf0f4/19856270775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ed060c-f018-45a6-95bc-633d2938f861/27977879732.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC5 5220 bytes
SHA-256: 42ab86de1b735fb5c1a78ec25354d7de82864ccb2aa22fc41fe4bd370393a035
font_01_sfnt_off0000a1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A9 10104 bytes
SHA-256: 77d7d528fcde5a21ab1912d9cac958b916f104f05e10637f4e0e0a2203abc5f1

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