Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca5315bedc52538…

MALICIOUS

PDF

81.7 KB Created: 2021-01-29 11:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 90699f0c8a78c7048c532e771b9b26bf SHA-1: a0bf60479d0adad3476ca5ec52d3385411e00c51 SHA-256: 1ca5315bedc525385d2b82222b3f279f72b48870f522e1110943c7adac3fac92
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection scheme. The primary URL, 'trafffe.ru', is associated with a keyword search for 'home run treadmill reviews', indicating a potential lure for phishing or scam content. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/wb?keyword=home%20run%20treadmill%20reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5ff27abeab077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5fc8c169e7a17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fd9f4c96b783.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/dEu07gv/gujalukulanosina.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/hg7Bfgd/converter_ico_svg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5ff0e3682386f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474720/normal_5fdeffe0b5f69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fdf5442bb533.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_60025357492c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465719/normal_5fc941dc2bc35.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/8976890.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/aeDNTjd/30707002324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490735/normal_5fe54308d9821.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/lezovedugaraw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476751/normal_6000bccf838ac.pdfIn PDF document text
    • https://jezexubuxerib.weebly.com/uploads/1/3/4/0/134040893/vaxelokuvo-denudefuju.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/2ia9Rgd/becoming_a_gym_teacher_in_california.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fe2374f3959b.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/C4TjiEk/sipivefojixazewa.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/jBjggeT/32293047994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_60101f833452d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 5084 bytes
SHA-256: 5099129ef2dfeb9037e56a9f47fc782bc5905dfb514e6067559c5faa60957a45
font_01_sfnt_off00011640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11640 10496 bytes
SHA-256: cbce2d07570c58e8b8b0749e5edd4834f5fe38b2068bba4bb1f755adac9d9dec

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