Malicious PDF — malware analysis report

Static analysis result for SHA-256 a207e22cedac4732…

MALICIOUS

PDF

43.2 KB Created: 2020-10-11 14:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e3472a48d93008b3a78ccff31c998451 SHA-1: 153dc8fe3a66dfdf18d22ca8642141ae216ca37b SHA-256: a207e22cedac473275a784ecea32d716dca6eba281c79df2590c227cf14d5274
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list. This suggests the primary function is to redirect users to malicious sites, potentially for phishing or distributing further malware.

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://cctraff.ru/pify?keyword=blank+nyc+jeans+nordstrom In PDF document text
    • http://senepisat.canadas911ride.com/uploads/1/3/1/4/131453674/viwaxapuvov.pdfIn PDF document text
    • http://denan.mariannezarzana.com/uploads/1/3/2/6/132695832/c6546c7ae7209d3.pdfIn PDF document text
    • http://files.rachelmathieudesign.com/uploads/1/3/0/7/130775987/welenizixeduzuk.pdfIn PDF document text
    • http://viboro.kiyoshiramenaz.com/uploads/1/3/1/0/131070806/113138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0935/9517/files/8355674873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1037/5836/files/99225448646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2626/7291/files/vezeson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9951/5816/files/panabimudebebukeri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3116/6615/files/the_information-literate_historian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4848/7070/files/claude_debussy_6_epigraphes_antiques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5015/1317/files/67434658497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2326/4662/files/gotijesasopezolaxotek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9889/0147/files/velocidad_de_la_luz_en_el_vacio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ebe7f6-8985-40d0-83f0-982882a53ddb/63631053006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706d15b1-51e3-4f9c-95d8-697e3557ae11/nafunuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4282b84-428e-4013-adc0-a64035de978f/gujabapilivugelow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbe2956-f31d-4ed7-b490-bdd5c4ae5f23/40681834436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37e16b2-f765-463b-acce-6146e29ae8ad/85402580787.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 5376 bytes
SHA-256: 57908510914d0ee3495a1e2c6742a79fa9c670703a9ebc59acbc91d3723f28a6
font_01_sfnt_off00007bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFC 10568 bytes
SHA-256: 4a44d6c6c9debabe2d5362d0e7e48970d4bcfa38495a3c1c9a575fadc7ab84f4

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