Malicious PDF — malware analysis report

Static analysis result for SHA-256 6843d226516fbe01…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 04:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 255ba179b69d92c7360e6d40a9ed946d SHA-1: ca67f3b2d5ce6340781a4ad640e7d6dae68d710d SHA-256: 6843d226516fbe016f8df8b1d443986b2ba4c5f9ebd0362d391b9f29abb025e9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though partially corrupted, includes the text 'Important general knowledge mcqs with answers pdf' and the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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/wb?keyword=important%20general%20knowledge%20mcqs%20with%20answers%20pdf
    • http://files.touchstonerunes.com/uploads/1/3/0/8/130814682/2438729.pdf
    • http://files.roadwaysport-n-trailer.com/uploads/1/3/1/3/131382470/4444440.pdf
    • http://najokaje.fossilschools.com/uploads/1/3/1/3/131384281/sasemalali-bekisutimabuma-mibese.pdf
    • http://files.lcanavigators.org/uploads/1/3/1/0/131070152/84f04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/pinugetewoxure.pdf
    • https://cdn.shopify.com/s/files/1/0439/1147/9464/files/drug_abuse_essay_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/95438473158.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/notifoxopog.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/zebiwifizokudixaz.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/teddy_ruxpin_value.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/ryobi_4_cycle_weed_eater.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/absorption_spectra_of_photosynthetic_pigments_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/nodejimowixowoleroga.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/jagisasalogosezabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2485/files/netflix_stuck_at_24.pdf
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/garmin_nuvi_200_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/skyrim_familiar_faces.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_off000055dc.bin
1ab1086fbd1da7bb67caac9b9fe5256086cee940530449bdf0f0d5b2faf221aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DC 5788 bytes
font_01_sfnt_off0000695d.bin
60747cfc261b1d65af141107a7976bed43460ca051708c6143585bdb80b2793d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695D 10144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.