Malicious PDF — malware analysis report

Static analysis result for SHA-256 53455c5528c87f27…

MALICIOUS

PDF

44.5 KB Created: 2020-11-06 06:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 53bb6bf601f207a1191686f558168cf2 SHA-1: d8208ff91d310b0b1e754b17320e6d91664d3329 SHA-256: 53455c5528c87f27be2b36142299c3598b8c3c2198089a0fb53af8e7157846ab
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=sandisk+sansa+clip+4gb+mp3+player+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f9c98ffbe6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368235/normal_5fa180726a0d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_5fa0c31cdd179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_5fa14d53318f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_5fa39d0b502bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f88f54df1621.pdfIn PDF document text
    • https://kefapadasogimok.weebly.com/uploads/1/3/4/6/134601884/fca26e7ca702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f98a7c8bd56d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417669/normal_5f977b4e1dcdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f994bf4540ba.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/wujapu/22731923595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bdabc4f-112a-44c2-bb19-58ff3c4b994c/baixar_livro_gratis_50_tons_de_cinza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7fd84e-30bf-4c86-99f0-69b3b63744c5/free_amazon_gift_card_generator_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/bastien_piano_basics_level_1_free.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_off00006de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE1 6056 bytes
SHA-256: ba0863775189363ea6e179da8ceb93a2642c702013b559b7849835d9d6f71b2a
font_01_sfnt_off00008272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 10140 bytes
SHA-256: 2b375b5cc613bfbdc2522883fe12c18b116ff0d12cd9e2e0f41d6cec6112774a

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