Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1eaa631b2dcd4e…

MALICIOUS

PDF

45.2 KB Created: 2020-09-17 15:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30fdb531988e40163de6b32d643c3bb8 SHA-1: fea7448eeb4ffe6f962c406624f65379820125e2 SHA-256: 6c1eaa631b2dcd4e681cd5b3a3301044fc541418c97f9ea55582aead0ab8b3b5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link related to 'Pandora apk android 4'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary redirector. The PDF also functions as a link farm, pointing to numerous other PDF files, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users to harmful sites.

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.link/wix?keyword=pandora+apk+android+4
    • http://files.mosssnowsticksouthpacific.com/uploads/1/3/0/9/130968984/5265743.pdf
    • http://roneje.tessaviamontephotography.com/uploads/1/3/2/3/132303382/gekesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/congruent_figures_worksheet_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/xefolidujoneg.pdf
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/hypertension_guidelines_2018_esc.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/nefezijif.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/las_vegas_aviators_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/92812663347.pdf
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/31138784120.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/jutoximoxewokopada.pdf
    • https://cdn.shopify.com/s/files/1/0449/0684/0231/files/apache_camel_in_action_free_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cef.bin
dd88fdfca0a89be81a3c04e975769a685ea95399ffb74d87c71f0239ce27b3fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 4488 bytes
font_01_sfnt_off00006c1b.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1B 1936 bytes
font_02_sfnt_off0000755a.bin
c9c88bbac3e96d92fb9eccb3e7ac7ab45b77f5c68d1fa0451e67ffaae63402de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755A 10672 bytes
font_03_sfnt_off000099ed.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99ED 4324 bytes

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