Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e4a3705a8cd45f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-21 12:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80811d46f75f8c8be8c4ffec56796061 SHA-1: e7717e997ef523d6f570a6255744f06fc3045f75 SHA-256: 01e4a3705a8cd45f91e4776af2802e5fc39956f6adc872e9e237b5bcfc8e60d0
194 Risk Score

Malware Insights

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

The PDF document contains a lure suggesting it is a Nintendo DS emulator, but it embeds numerous links to external resources, including a known malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing something, likely to facilitate further malicious activity. The presence of many PDF links and a critical redirector link suggests a link farm or phishing attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.com/pify?keyword=nintendo+ds+emulator++for+android+phone
    • http://pibikuwi.trattoriatotarobyob.com/uploads/1/3/2/8/132814930/tefavaxumujexuko.pdf
    • http://files.sarahpikedesigns.com/uploads/1/3/0/7/130775649/vebarozu.pdf
    • http://files.bazarartandgifts.com/uploads/1/3/0/8/130874431/3952320.pdf
    • http://bomiveki.businesstodaynewsletter.com/uploads/1/3/2/6/132695742/869214.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/radadatunebiludapofuxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/brilliant_pala_screening_test_question_papers.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0047/files/ragunoxotunavewab.pdf
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/files/albert_camus_the_stranger_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/learning_surgical_instruments_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/sidowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/talent_management_contract.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/nujex.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/fisimuxopozewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/jadijowix.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_off00006277.bin
3b3136440338d82e79e37e78e92f1e87341dcb1a81853f7b734f99d35ef54178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 5248 bytes
font_01_sfnt_off00007422.bin
658032162bceae5fb5654301f01a7974388cc66fb67ef404cf941345faf520e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7422 9756 bytes

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