Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d0177b977a1a59…

MALICIOUS

PDF

40.3 KB Created: 2020-11-01 11:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6393bd5909e14c4431423325aa4ef1e4 SHA-1: ce1410f2b36dfd45d5a45cfcbc20183fc2803150 SHA-256: 73d0177b977a1a59ab77595fbe713b8940e6791d33180107893cf3ad1ca90af6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URLs, suggesting an attempt to disguise the malicious intent. The primary goal appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.link/123?keyword=paper+mario+ttyd+randomizer In PDF document text
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/pobuz_xujuni_kexogoverip_pezulirevufom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f8abad8f1147.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/nipoxanewakaxuboke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5f8b60a23db56.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/9c0541618c593b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_5f9e550518f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f8d13837ea13.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/nabelebefawedamal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383794/normal_5f90d0d6b8c0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julaxel/swedish_adjectives_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4299c4-074e-4d2f-960d-e4a268cc515f/lalasizixeko.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E98 5048 bytes
SHA-256: 5a7e0a55cedb947913f940a5977816575f42b3473a5a9a8cbb4b31a449d79f5d
font_01_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10888 bytes
SHA-256: cba8f067d5aa8e6922796caed411e5984c5dc5468579f7fe2be6ede36d71810d

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