Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b2384a5e041877…

MALICIOUS

PDF

50.7 KB Created: 2020-11-01 21:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1f7e43ffc3e9e8ebbfa649420d21c8c0 SHA-1: 36d214f43088124e356a785b48473fae5731cf29 SHA-256: 99b2384a5e041877244465a732e24e54168a7e467815459fb264206a8fd1dc4d
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL https://gettraff.ru/aws?keyword=words+that+start+with+sid is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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/aws?keyword=words+that+start+with+sid In PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/6378050.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/cf9f602737939c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8bbdc73f3ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7e264ea6-abac-44be-9944-466e8ff4e0e7/pomagesutujolubixomivuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1421/1742/files/to_be_fair_you_have_to_have_a_high_iq_to_understand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4948/7002/files/one_piece_episode_734_english_subbed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa348db-87ed-4d91-82cb-c167d2f94015/95718599389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce209a60-53b2-4885-86e8-78b4d6d1cf7c/codigo_j_fgts_pode_sacar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6189/9171/files/coreldraw_x3_shortcut_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1994/3067/files/rj45_rj11_cable_tester_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4276/4457/files/segotukeralot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/56502163724.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C26 4552 bytes
SHA-256: 3b8195a8df967cbdaa1fae41928d68a5c19759147d55fba7ce98e517cd54b257
font_01_sfnt_off00008bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 10720 bytes
SHA-256: e89944d7266718b8f4630a39ca60ba1602b5d9a7ffef8f2ab422614f92d7b2dd
font_02_sfnt_off0000b005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB005 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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