Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9a11c8b9daf463…

MALICIOUS

PDF

78.3 KB Created: 2021-01-21 12:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: db2af605a6e5e3aef6940e872d43a1eb SHA-1: 9c9455fa9bf981f194f4fa4da7f021bb2b46c3a5 SHA-256: ed9a11c8b9daf463b510daa4361f6113cdcf85ca4de7aee6ee930d74c35fa234
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, including one pointing to the known malicious redirector infrastructure at 'https://gettraff.ru/aws?utm_term=bootstrap+4+form+date'. The document body is heavily obfuscated, but the presence of many links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?utm_term=bootstrap+4+form+date In PDF document text
    • https://site-1174816.mozfiles.com/files/1174816/desofesunesomadowofivoje.pdfIn PDF document text
    • https://site-1174105.mozfiles.com/files/1174105/28908172239.pdfIn PDF document text
    • https://site-1176767.mozfiles.com/files/1176767/58546873552.pdfIn PDF document text
    • https://site-1196795.mozfiles.com/files/1196795/96256924677.pdfIn PDF document text
    • https://site-1181017.mozfiles.com/files/1181017/76743589519.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/46519815230.pdfIn PDF document text
    • https://site-1248249.mozfiles.com/files/1248249/brussels_tourism_information.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/44891761091.pdfIn PDF document text
    • https://site-1190639.mozfiles.com/files/1190639/vazifomabosedaxotutilujan.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/the_bucket_list_book.pdfIn PDF document text
    • https://site-1166671.mozfiles.com/files/1166671/62255221523.pdfIn PDF document text
    • https://site-1250030.mozfiles.com/files/1250030/gathering_guide_bdo.pdfIn PDF document text
    • https://site-1168379.mozfiles.com/files/1168379/edmodo_apk_login.pdfIn PDF document text
    • https://site-1167994.mozfiles.com/files/1167994/76204586927.pdfIn PDF document text
    • https://site-1173152.mozfiles.com/files/1173152/dungeon_defenders_hall_of_court_survival_guide.pdfIn PDF document text
    • https://site-1254440.mozfiles.com/files/1254440/ziarat_e_ashura_in.pdfIn PDF document text
    • https://site-1186310.mozfiles.com/files/1186310/44300374287.pdfIn PDF document text
    • https://site-1166725.mozfiles.com/files/1166725/1654868106.pdfIn PDF document text
    • https://site-1239280.mozfiles.com/files/1239280/96858090899.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
    • 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_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 4928 bytes
SHA-256: 9ccb04429e0adb81e89b0ab3316158895f3c45cfb7904d9cea9bdea70d1bacc7
font_01_sfnt_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 12484 bytes
SHA-256: 5218bcd36aee7e987d0b99e27c88e86dc100e7099860f54b066f682788288ea6
font_02_sfnt_off00011c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C60 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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