Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bddad8ae0a53b40…

MALICIOUS

PDF

33.0 KB Created: 2020-08-18 23:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6332c529130db4a2267e107db12d56b6 SHA-1: 15c51ca116a0e933cb382d95a31e9b4ab9834766 SHA-256: 6bddad8ae0a53b40f95906fa2c4d8413d50e07d8d182ea918cbe50d3492f59cd
202 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The presence of a 'download button' lure and instructions for password-protected archives suggests a phishing or social engineering attempt to trick users into downloading further malicious content. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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=alvida+alvida+noha+mp4
    • http://files.islandparkvillagefl.com/uploads/1/3/1/1/131163904/nasoxaviz.pdf
    • http://dedowami.ellenjoycetrayer.net/uploads/1/3/1/3/131383483/meparanapafib.pdf
    • http://files.sacredghostrecords.com/uploads/1/3/0/7/130740625/6832231.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/69043261983.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/derupoderumujokakarijuli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kazapuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/viduju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/37621634514.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/defebiwuxinikeriku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/genetically_modified_crops_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/fisopanofugufigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/folumerunufexirapaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/59680563731.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_off0000441e.bin
0af4045864829d1fb461c1a4f1bbaf25b5bebad2da0d1eccdaa07de86e5e36f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x441E 5064 bytes
font_01_sfnt_off00005531.bin
f8805d28716250a8b9e6095a669ee1c31d334575f469823bebde5ca28740b768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5531 9664 bytes

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