Malicious PDF — malware analysis report

Static analysis result for SHA-256 9551a7ee57da772b…

MALICIOUS

PDF

78.5 KB Created: 2020-12-30 10:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bca348a05ba527820da7300fb2254ee9 SHA-1: 7931a016988fc7ad3e90eab992555771132cf4ab SHA-256: 9551a7ee57da772bc2475d2402238d9cede0d34ddc8cfd7a0962b3559fdd7706
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://gettraff.ru/123?utm_term=mr+coffee+thermal+coffee+maker+manual'. This suggests the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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.
  • 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/123?utm_term=mr+coffee+thermal+coffee+maker+manual In PDF document text
    • https://jibarekoruw.weebly.com/uploads/1/3/4/4/134445620/332105496.pdfIn PDF document text
    • https://sawasorepe.weebly.com/uploads/1/3/0/7/130739445/6566826.pdfIn PDF document text
    • https://gefozovunipor.weebly.com/uploads/1/3/4/5/134585144/6878010.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/VT7jcpK/electric_fence_voltage_tester_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5fc3421b0de27.pdfIn PDF document text
    • https://xitawameduzip.weebly.com/uploads/1/3/4/5/134511141/1309107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f8b6aa8b081d.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/ghVbhjy/5238706924.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://s3.amazonaws.com/pugomonapoxuxe/68067476592.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_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 4848 bytes
SHA-256: fdb4b830d27e8427a087793b31516cc271dd4c482023e9179e79de164aa38e0b
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10388 bytes
SHA-256: f4f35d539206d62e7bc8eca6c92ae9f2bf1e03f6fe40ef0c1d4e8d742f7b26ac
font_02_sfnt_off00011ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c