Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d60da1951d740a…

MALICIOUS

PDF

48.4 KB Created: 2020-08-20 23:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d166a02c902c180ed5a88fb7e0d40b SHA-1: 7ec120df717a2874ac790b4833f9c8a8f93b00ef SHA-256: 14d60da1951d740a77fe46a96994e3d06201203f26dc87f8c69c2fb8ab47e095
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with SEO-friendly keywords. The ML classifier strongly indicates maliciousness. The document body, though partially obfuscated, contains the malicious URL and references to other benign-looking PDF files, suggesting a link farm or redirection scheme designed to lead users to harmful content.

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=classic+wow+leveling+guide+warlock
    • http://files.eandrewmurrayphotography.com/uploads/1/3/2/7/132741339/2eafdf2043531.pdf
    • http://files.kirstinrg.com/uploads/1/3/1/4/131437005/sikevuguletogototut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/vidumomogivofozakop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/63203783153.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/subaxivixutirawukozixanax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/eminem_albums_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/jafelujepitakug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/97103835791.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/73744460999.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/gezara.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/introduccion_al_dibujo_tecnico_arquitectonico.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/rolumawelofodavuruzelave.pdf
    • https://cdn.shopify.com/s/files/1/0434/3690/0504/files/tiliwuposalapeduxirada.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/aetna_global_benefits_claim_form_uae.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_off00007c87.bin
c2611ce571a0847d050d56a2f3adf592c845bccd0911935ef7917211ae82a78c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C87 5228 bytes
font_01_sfnt_off00008e6d.bin
1bf9c6a2d1b0f9179b8e9d37bd1e34b0c118455bb527f620b2dc52f38c922bef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6D 11636 bytes