Malicious PDF — malware analysis report

Static analysis result for SHA-256 70513d7009a60402…

MALICIOUS

PDF

46.4 KB Created: 2020-07-23 07:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0429a38485493e02ffee6f4f5cd7b90e SHA-1: f853cea6cecf12b1388abad7f8c3325c62978c34 SHA-256: 70513d7009a604022876ec994ee3e2b2393750efc417723f0abcd8ed10d761bd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm infrastructure designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure. While no scripts were extracted, the overall structure and the presence of numerous links suggest an attempt to lead users to malicious content, likely as part of a phishing or scam campaign.

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://ttraff.com/pify?keyword=estilo+de+aprendizaje+auditivo+pdf
    • http://files.ellenbrookeelsnc.com/uploads/1/3/0/8/130813447/7a190487774692.pdf
    • http://files.freddyzhaulingmoving.com/uploads/1/3/1/6/131607522/tegukasafumokemoxo.pdf
    • http://files.mx.autumntheodorephotography.com/uploads/1/3/0/7/130776611/53e81d9673d0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/takodowixorenefaleje.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/fevokawalepagofe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/91250704265.pdf
    • https://fewogixaba.files.wordpress.com/2020/06/gobozasakukibuw.pdf
    • https://gozinogix.files.wordpress.com/2020/06/juvedulub.pdf
    • https://zefiziwa.files.wordpress.com/2020/07/56036893960.pdf
    • https://rufumeridap.files.wordpress.com/2020/06/43319193468.pdf
    • https://budixevox.files.wordpress.com/2020/07/fitejivugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/87862791796.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/pajoxelelonova.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/79435383054.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/tikuditikamimumudoxasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/wuwubodijojoxaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/rotinufefobozukavap.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/lojotapikofemovawi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076bb.bin
d8eea01243b06cd1d5c3ef79c91f0790584cea5647dd2c1da3892a476457a3bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BB 5060 bytes
font_01_sfnt_off00008810.bin
7a4a8273fadf1e79e143cc38ed6f3cbadb030911b55aefd9245157bdf014d312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 10636 bytes

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