Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ea128079c28444…

MALICIOUS

PDF

49.1 KB Created: 2020-10-28 23:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33dd64a790852c75da076f38c5a33933 SHA-1: 9aba91241bdd1d34edc87c168ce424a963d6949f SHA-256: 38ea128079c28444124d26e2da46e8a131138f4de9b3c697268bd8a272e9c227
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to cancelling a PayPal payment, directly linking to a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the embedded URL confirm this malicious intent. The document also exhibits characteristics of a link farm, suggesting it's part of a larger SEO manipulation scheme to distribute malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/123?keyword=cancel+a+recurring+paypal+payment In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f8df3279b463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8cafe0ece5d.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/1/0500/2441/5382/files/binal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8354/4772/files/xowurij.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/honeywell_proseries_thermostat_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1229/5325/files/liquid_chlorine_for_pool_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/acne_vulgaris_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7333/1899/files/astraea_type_f_rg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0685/4821/files/manuxedivaven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8229/4469/files/redebosipigoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5272/0039/files/wooden_balance_bike_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/certificado_medico_secretaria_de_salud.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/10990660128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/9265/3234/files/843106656.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/learning_to_love_yourself_book.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/68308723268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4184/0534/files/britax_boulevard_70_g3_installation_rear_facing.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/86212923305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3008/8342/files/13835913884.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/zavufolexiwiselusezum.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/aerated_autoclaved_concrete.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_off00008131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8131 5080 bytes
SHA-256: 489541a1b98a273820ce84727b0c5ba78abd7d2ab903033a85ebe5c9b18309c0
font_01_sfnt_off0000926d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926D 10704 bytes
SHA-256: 222cd44f642985b596071289e25366b2b0436b91a4537f6238dcd4fc67dc8543

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