Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb52207b0e7421ee…

MALICIOUS

PDF

33.0 KB Created: 2020-08-13 22:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a53549d3ab64ec19b04aeed1be00b011 SHA-1: 6cf59fdd8662f6a924c8b577030caf9b2711ead5 SHA-256: eb52207b0e7421eecaddc062fe270b740a0da35cc98f26a1e23b82d13f1ef341
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL analysis confirms the presence of numerous external links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the suspicious URL, suggesting a lure to obscure the true malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bodo+romantic+song+free
    • http://votajiver.kimberlydevlin.com/uploads/1/3/2/6/132680932/fifirokufokazun.pdf
    • http://files.mrsconnieholmanteacher.com/uploads/1/3/0/7/130776861/mifagomu.pdf
    • http://files.bulutmak.net/uploads/1/3/1/6/131636941/a684499fc68e.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/74922339297.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/xevazubojafepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/47921074357.pdf
    • https://cdn.shopify.com/s/files/1/0444/5673/8983/files/describing_character_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/dudinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/70644621978.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/antiretroviral_therapy_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/brew_start_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/davarobakaril.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/1524370767.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/65628747911.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042d1.bin
d77c150e8576789794d1b18704aded2e9edc0b67f5b8d2d21f6017955d3fcee3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42D1 5360 bytes
font_01_sfnt_off000054ef.bin
96d634b09e0ad060e93dcfc8cd32b6078bb29a1378cb39679b4d93adfe8c5d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EF 10200 bytes

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