Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd02c6a25884baf4…

MALICIOUS

PDF

56.0 KB Created: 2020-08-12 18:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eee8302310a9e4be013395a8715fad78 SHA-1: c396f3b57e95edba419d663e8806b06266fb540a SHA-256: fd02c6a25884baf41cac915da46ec652a0f3692561ba236f6aa04255985b19e5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'ficha numeros romanos 4 primaria pdf'. The presence of a link farm and a critical heuristic firing for malicious redirectors indicates a high likelihood of this document being used for phishing or malware distribution. The primary malicious IOC is the redirector URL.

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=ficha+numeros+romanos+4+primaria+pdf
    • http://files.ramlcpa.com/uploads/1/3/1/4/131483108/pukenurax-keken.pdf
    • http://tageti.koffienator.nl/uploads/1/3/1/6/131607062/vaxajireroko.pdf
    • http://files.madisondphil.org/uploads/1/3/0/9/130969498/karokaxumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/89645970954.pdf
    • https://cdn.shopify.com/s/files/1/0435/7862/2115/files/kizotupumamerugovodi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/form_433-_f.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/67115941906.pdf
    • https://cdn.shopify.com/s/files/1/0428/6329/6678/files/bixidudopagetuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/business_email_writing_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/94712659214.pdf
    • https://cdn.shopify.com/s/files/1/0437/1585/4490/files/46223346178.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/93882740909.pdf
    • https://cdn.shopify.com/s/files/1/0445/3960/9252/files/ejercicios_resueltos_de_analogias_y_distribuciones_numericas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49181926903.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/86069988645.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/central_intelligence_xmovies8.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007beb.bin
466edb77987eedb8a1997829847970a7e49970f97f39a1ad299059b1c4edb762		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEB 5408 bytes
font_01_sfnt_off00008e19.bin
64687a10abbfa3a2d49b18555d1dd4399f75638394a18c3873ddf14f13bef8fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E19 14904 bytes
font_02_sfnt_off0000bbdd.bin
726e433c7bbdf2a5a395708565affa97fb04a35428008954b5256cf6adea57e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDD 16164 bytes

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