Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee1f0a1ff56759…

MALICIOUS

PDF

41.9 KB Created: 2020-08-21 14:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1c83c567fb95b118a6b195bc8ef08f4 SHA-1: 3ac7b1cddf32963294b19d465efead71532dc086 SHA-256: 0bee1f0a1ff5675930b5acc29454ea60dd3a9892c2e69cc4632493c4d03e2d94
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded link structure suggest a lure to download content, likely a malicious payload. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=bhojpuri+movies++free+2019
    • http://gatud.mayokindergarten.com/uploads/1/3/0/7/130740112/xutigo.pdf
    • http://sesazo.mariemanski.com/uploads/1/3/1/0/131069934/93ce204.pdf
    • http://files.choralartsmusic.org/uploads/1/3/2/6/132681456/3763129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/4474536157.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/41289693502.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/58767955166.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/meditation_guided_short.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/72160695035.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/ciencias_formales_libro.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/99370507541.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/73105635630.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/ios_icon_grid_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82127534182.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/clinical_biochemistry_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/3012293386.pdf
    • https://cdn.shopify.com/s/files/1/0443/1986/7036/files/mulogogojajusitusoto.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_off000059dd.bin
33b31ba6c5443b6c872a5f84f8b0d640202f0346477da1241d5ec7c986374e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DD 5568 bytes
font_01_sfnt_off00006cc2.bin
c8b360a49638e50a4c17bd3eb254eb4003ef8498cac39fb6f10b2ed8250ea175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 15048 bytes

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