Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9d2a75921605c6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-12 03:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0e0468f963be4c8b2cb4667bf0dcec SHA-1: f05c3965599aff1d3b772c05bdd4e4fe8b762c77 SHA-256: 1b9d2a75921605c6743b3367fa20f6b7bc7317b28fc66a909222217554f5849f
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.ru/pify?keyword=el+capitalismo+historico+pdf
    • http://nifisu.dalais44.com/uploads/1/3/1/6/131606027/5c045e.pdf
    • http://files.awakeningtouch.ca/uploads/1/3/1/4/131437318/c5306603e3d3a40.pdf
    • http://files.readingtheforest.co.uk/uploads/1/3/1/3/131379253/bd03feb4ac10dd.pdf
    • http://files.rkmirrigation.com/uploads/1/3/1/1/131164431/4d7d26297994f.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/14903070182.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/87625098680.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/6891386070.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2442/files/mezel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9494/0575/files/21929168353.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/98661860834.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/esame_celi_a1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2224/5273/files/20587310330.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/proyecto_caldera_de_vapor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/derokewegatuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8817/5519/files/mafojogonolitix.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_off0000529a.bin
ae4ce0594689d8e23347cc9b017256613bf9bb2140b5929619d67742f88ae8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529A 5352 bytes
font_01_sfnt_off0000649e.bin
517e4be10510091e3060688da37e95f01b056a96cf4cc3d9baa78186a046bc7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 10696 bytes

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