Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa91577d114108fa…

MALICIOUS

PDF

73.5 KB Created: 2020-11-24 20:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7fe46d45decbff79721884014a426f35 SHA-1: 918effbb2f3bd8abefc14b83542eda821332e370 SHA-256: fa91577d114108fa44f503d5c4a4076c9f7b5ebb6b440083b0c343497baddbcf
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 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or to download further malware. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffking.ru/strik?utm_term=skyrim+calixto+chest+key In PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/6798656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8bce8c784f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_5fb4610f990c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fada00ad4cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f95fc15df664.pdfIn PDF document text
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/jatiwoxixetise.pdfIn PDF document text
    • https://tenasusuboziwid.weebly.com/uploads/1/3/4/3/134349012/9172179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5f9f1387562d4.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/62429546-1d7f-41ce-ab8a-797cd735564f/tiwajolojokuzikezaganofu.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_off0000d568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 5056 bytes
SHA-256: 7f8a3793219fa72618688892b2d13ce65e68f52aab8ec16e6b74adb02df139f2
font_01_sfnt_off0000e697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE697 11168 bytes
SHA-256: 7170be7695e3b4fddda7a9092919e5529b16bdd46f18b494dbd733cb7615d771
font_02_sfnt_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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