Malicious PDF — malware analysis report

Static analysis result for SHA-256 83434246e172c025…

MALICIOUS

PDF

41.1 KB Created: 2020-07-30 07:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6779282a292a5c90567795c85522c172 SHA-1: fc97d7c0abceb878d2071fe9f25dd10a0365945e SHA-256: 83434246e172c02544b45a0e48e76a9acec6bab20ab32b361c0e00a0e378ad42
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains numerous links to external resources, with a primary link identified as a malicious redirector. The document body, though heavily obfuscated, appears to be related to search engine optimization for PDF documents. The presence of a malicious redirector suggests an attempt to lead the user to a harmful site, likely for phishing or malware distribution. The heuristic firings strongly indicate this is a link farm designed to manipulate search results.

Heuristics 3

  • 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.
  • 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=cambridge+primary+mathematics+2+pdf
    • http://files.cattongrovecentre.org/uploads/1/3/1/4/131438111/newujudisaburul-pusulu-sapirixup.pdf
    • http://files.ianwarder.com/uploads/1/3/2/6/132681690/zepopogonam.pdf
    • http://files.steveblanchardmusic.com/uploads/1/3/1/0/131070313/fibul.pdf
    • http://files.kerishea.com/uploads/1/3/2/6/132682913/bovazari_lesifavab.pdf
    • http://files.cattongrovecentre.org/uploads/1/3/1/4/1314381
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/49177169505.pdf
    • https://cdn.shopify.com/s/files/1/0437/3810/3962/files/lagegifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/dudivesusazezewepotekiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/46624684144.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/rixofofikimaxaxejizof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/95397554570.pdf
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/50409513474.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2213/files/18002039255.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/47486165853.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4018/files/62979748255.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/81315411766.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e34.bin
53c5f8f1a49cbbfbb3667e70a8c1cf7fc39314986af140c575fddd509bfd7500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E34 5504 bytes
font_01_sfnt_off000070fe.bin
3908a870eb67d458c8acb2ab13fbc42149b09881ac37801f928b41a5a7a26e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 13204 bytes

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