Malicious PDF — malware analysis report

Static analysis result for SHA-256 35372385e0341bb3…

MALICIOUS

PDF

48.0 KB Created: 2020-08-10 06:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d7c9fab40039786a817dda372f45e9 SHA-1: 74558372c308b16d601c70a8996121cf3c60dcff SHA-256: 35372385e0341bb31cb2eeb2aa65ff1933319f9c09ee941be120fc8cdd8722fb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=spanish+grammar+in+review+3rd+edition+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. 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.com/pify?keyword=spanish+grammar+in+review+3rd+edition+pdf
    • http://nixemuga.mrsbhatt.com/uploads/1/3/1/3/131379803/tetoxeduroda.pdf
    • http://files.sl-ltd.com/uploads/1/3/2/7/132710678/2298013.pdf
    • http://files.thestrongfamiliescommission.com/uploads/1/3/0/7/130739288/dafomaxo_feduwekut.pdf
    • http://files.humilaid.com/uploads/1/3/1/4/131438423/vamudurox-dabasuzuwerela-pedogivo.pdf
    • http://files.stanleyskidsministry.org/uploads/1/3/1/3/131379343/5508109.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/lopulumij.pdf
    • https://cdn.shopify.com/s/files/1/0435/8674/8579/files/rurukigawufidorexapuzisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/93290744522.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/what_does_xd_mean_sexually.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/26134253546.pdf
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/kigumarimofikijatexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/daystate_air_rifles.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/63743805477.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/1634822127.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/2006_street_bob.pdf
    • https://cdn.shopify.com/s/files/1/0435/6944/7073/files/49373745455.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_off00007d0c.bin
ca4b65b07164f9e53b801b323f632a51273fc48ea3e5951cc80f489765895591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0C 5844 bytes
font_01_sfnt_off000090dc.bin
be2ec02db74335d3a3e7796c4de848d744ce5171f018501c6291ccae7d1849f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 9828 bytes

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