Malicious PDF — malware analysis report

Static analysis result for SHA-256 45712b3fc5404854…

MALICIOUS

PDF

40.2 KB Created: 2020-08-05 03:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06c27170bc2e4d78f02ef5461b730d0c SHA-1: a17c809bf7bda634bea706ebcc7dbd46960bf61c SHA-256: 45712b3fc54048544310452bbd3393f55d479ba5a5df5347f917d734b7b89086
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'technical drawing' and a URL that appears to be a lure. The heuristic firings strongly indicate malicious redirection and link farming, suggesting the document's purpose is to drive users to malicious infrastructure.

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=technical+drawing+12th+edition+giesecke+pdf
    • http://files.melodiestheatreacademy.com/uploads/1/3/1/4/131437158/5581040.pdf
    • http://files.skagitcohousing.org/uploads/1/3/1/4/131453350/pakosekisogem.pdf
    • http://files.ricksmobilerv.com/uploads/1/3/2/3/132303238/02fd0933.pdf
    • http://files.pinehavencamp.org/uploads/1/3/0/7/130776406/lopavopijimeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/95138780311.pdf
    • https://cdn.shopify.com/s/files/1/0428/4920/6439/files/77545830144.pdf
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/kikonep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/82982842080.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/firozovavalalagilobefera.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/sesobamoret.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/keguvugofumenefufirula.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/mojuxepodonob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/60770038855.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/53493330654.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/pitozenegizut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.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_off00005d2d.bin
3c582a1b2438ed3312ee22ca326a1ad4b1c1372d5de10226aaa58bacd49f52f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2D 5708 bytes
font_01_sfnt_off000070b3.bin
33cf3103223336aabd1a174fc622d2a7ae976e0286fcd820f643be348740f8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B3 10336 bytes

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