Malicious PDF — malware analysis report

Static analysis result for SHA-256 356d4fc28482b229…

MALICIOUS

PDF

44.9 KB Created: 2020-10-29 23:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6771b3aad58217940f3c605fb97b37b6 SHA-1: 741d3cd6c6c3e3d4ee100b0e42d8169256d94da5 SHA-256: 356d4fc28482b22944cd10b5ca603ae5eadeabd13aaa1aebe2b77cb029910432
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.club/123?keyword=cde+2020+standards+online, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload.

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://ttraff.club/123?keyword=cde+2020+standards+online In PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/f81dd8c975d7.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/rikuzojixi.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/dajivijiwa.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/tegawumoxa.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://cdn.shopify.com/s/files/1/0501/5201/3985/files/download_mlive_mod_apk_2.3_4.0.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/define_behavioral_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/9385246611.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/statistical_analysis_of_geological_data.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/genki_2_workbook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/10793289827.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/battle_e_ribbon_coast_guard.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/merojugalijofojoduxegirer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/pivoter_dans_word.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_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 4904 bytes
SHA-256: 27dbb089ce598bbecd2b46f3e52952c92d2254c553ad3673d71e71558a3552d4
font_01_sfnt_off00007631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 10152 bytes
SHA-256: c4f382d9ae6c4a546f1e4d2bffd039a2b607c77ad9a3b8936e8f722f3bbe0a8b
font_02_sfnt_off000098de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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