Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71734b953d8bf79…

MALICIOUS

PDF

55.8 KB Created: 2020-11-05 01:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b63a952f1be40cb576d6c97e681435b5 SHA-1: 9cc7f33b24982d3372f0b88ccc12f1352d7b7b75 SHA-256: d71734b953d8bf792725a81b40d54db4784ba3555c917b1feb04b57e2bd07631
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting services and a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for popular media content. The presence of a malicious redirector and a large number of external links strongly suggests an attempt to drive traffic to malicious sites, likely for SEO spam or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=watch+one+piece+stampede+eng+dub+free+online In PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/5e623.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/2648282.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/narodewavuzekom_xivatiketavas.pdfIn PDF document text
    • https://sinevojixataxer.weebly.com/uploads/1/3/4/1/134131740/c28ed5a6bf2.pdfIn PDF document text
    • https://jajewivazag.weebly.com/uploads/1/3/4/4/134491582/demefenulune_tuzuxufa.pdfIn PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/wugugerikevabiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_5f9e0699f12d6.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/bomoworejitin-jijuvu-dinavo.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/223f30e8-d549-49eb-a4bd-ab7b65c9eb54/lowuxexesafejaguzavawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c76939-12d7-4122-92a4-a8c6113f2c2b/sotuzunapinupizorira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9183597e-89ce-4121-8ff2-ad3f4817cc81/sijuluguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc56f835-70bc-42f4-88b0-67e58f85b1a2/43851733988.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC3 5604 bytes
SHA-256: e2dc8bda27416afec415e63758edd8ccb05448aef1e9f46eaa06ecf924714a93
font_01_sfnt_off00009d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9E 11308 bytes
SHA-256: 5e5d9702a85bf21e354d208035d733bae6c67529c36e678b52efcb177fa3b386
font_02_sfnt_off0000c3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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