Malicious PDF — malware analysis report

Static analysis result for SHA-256 083e320b0f5820f0…

MALICIOUS

PDF

39.9 KB Created: 2020-07-11 23:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573356c269382b2a3ddadd8bf52c6748 SHA-1: 4e9963f42a78d8cee163a3a2587ac35c45383a26 SHA-256: 083e320b0f5820f025754e372711f4d498eaafe2f55e2f632353570cf3f0d092
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the text 'Reality tv show proposal sample pdf' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=reality+tv+show+proposal+sample+pdf
    • http://files.livinweedy.net/uploads/1/3/1/4/131406855/gotaverisodoj.pdf
    • http://files.shawnhurleyministries.com/uploads/1/3/1/4/131406068/fuburorotisil_fesojewakatak.pdf
    • http://files.thecotswoldcollection.net/uploads/1/3/1/4/131437753/kumowoloded.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/27326207352.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/67522396022.pdf
    • https://mopomuwoza.files.wordpress.com/2020/07/90997340290.pdf
    • https://lepezom.files.wordpress.com/2020/06/tawapifoxutiwebaro.pdf
    • https://foxiwip.files.wordpress.com/2020/06/sapilapofimig.pdf
    • https://volutabeni.files.wordpress.com/2020/06/mofitidexukajogasivoxefa.pdf
    • https://pefeledegabo.files.wordpress.com/2020/06/rumuri.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/20979753245.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/wevonugasenuwofatefomax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38138836364.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/85912699107.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/53205426529.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_off00005dd3.bin
f883238ac4a039727b4fddf9ba7d395e7331d574963a0f954278411c7ae3b206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD3 5224 bytes
font_01_sfnt_off00006fb6.bin
025776dfa4e514563c838536753131c70e167aad45709c25319c7aa7c1b06156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 10212 bytes

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