Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de865d80dd49564…

MALICIOUS

PDF

55.3 KB Created: 2020-08-09 21:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f1095b357ddbc623b996e963191004c SHA-1: e1f8d24e762278121bcb3d9718a715bf05e76b17 SHA-256: 0de865d80dd495643b7802df25abea57dce7174fe1167494c3d1dd32cbc6acd4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The ML classifier also flagged this PDF as malicious with high confidence. The primary malicious URL identified is a redirector, suggesting an attempt to obscure the final destination and potentially lead users to a phishing or malware download site.

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=apresurar+la+obra+de+salvacion+7.+4+pdf
    • http://files.gannonjwattscounseling.com/uploads/1/3/2/6/132682022/7f8b22ff5febf43.pdf
    • http://files.krishnadelapaz.com/uploads/1/3/0/7/130739860/39cb75.pdf
    • http://files.mukewatercreative.com/uploads/1/3/1/4/131410158/c9d5fabd451e2a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9320/2846/files/acetone_butanol_production.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/wejosojilowukawerolok.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/47579001139.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3975/files/tuxusubusofudos.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/vicks_filter_free_cool_mist_humidifier_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/boland_college_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9196/files/psychology_facts_about_love.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/piano_classical_songs.pdf
    • https://cdn.shopify.com/s/files/1/0435/3071/5288/files/pafirivuwajewoximiruwuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/manifest_your_magnificence_affirmation_cards.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_off000089b5.bin
80db3a10e524a6a2cd74b978dd792ddb15665a2d1dfa242e8b5abb98e9180be1
pdf-font-stream PDF embedded font (sfnt) at offset 0x89B5 5536 bytes
font_01_sfnt_off00009ca8.bin
9e6f3a4207a6cacc91488299fd261a427d26833f822ba708319d1778ba5d6e1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA8 16804 bytes