Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb2e8c4513e0b9c…

MALICIOUS

PDF

61.3 KB Created: 2020-08-20 15:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fea7cd5fa615e7cbe1d91b3e64c17f29 SHA-1: a7b0ceb75200e550766b912f54eadbc195fa156f SHA-256: cfb2e8c4513e0b9c320f5ad7dffcbe199083c12834a3b6dc900ce530b0522285
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, disguised as a job application format. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the redirector. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains the malicious URL.

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.
  • 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
  • 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=teacher+job+application+format+in+gujarati+language
    • http://files.surfacestudies.org/uploads/1/3/2/8/132814465/ganeji_zopodokur_nirujoworafos_bifiji.pdf
    • http://pigoz.simonperathoner.com/uploads/1/3/2/3/132303054/3546616.pdf
    • http://vobikor.thelabclan.com/uploads/1/3/1/4/131414661/lapedorupe.pdf
    • http://files.glenmorey.net/uploads/1/3/1/8/131871871/bisozum_misufowu_benidilawa_rajosapefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/approximation_questions_for_sbi_po_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/dugog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/autismo_segun_la_oms.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/85896859808.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/82037394588.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/84786064925.pdf
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/angina_de_pecho.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0528/files/54483696484.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/50085042103.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/abstractness_in_phonology.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/poxizimirufowosovipobi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/xoxilegasapaladogox.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a91d.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA91D 2828 bytes
font_01_sfnt_off0000b317.bin
75245262ba14ea307b474a817ffe097821a5847d4c8661daf1ed499e761c66ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB317 5416 bytes
font_02_sfnt_off0000c55b.bin
9ed448e71223c75f8c32667a99023c53e017ca938402e062c6aaa9316de1da61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC55B 9896 bytes

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