Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e37a57c9201738…

MALICIOUS

PDF

48.6 KB Created: 2020-08-11 02:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb7e442e1ac6ed508e088d7f19355fb SHA-1: 71ea98cce3356e34d980bebadef7daaea3da99dc SHA-256: 12e37a57c9201738384a6d72191516f05e19062367fcb940c9c989c939d6927e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users. One of the primary links directs to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=cracker+barrel+gluten+free+menu+pdf
    • http://files.sitting-at-his-feet.com/uploads/1/3/0/7/130739826/bubonujoror_jeniw.pdf
    • http://sabupo.talaldaoud.com/uploads/1/3/0/7/130775997/vuzogaxekawep_xutinutetulim_lejerarinilomaz.pdf
    • http://files.baremedispa.com/uploads/1/3/0/7/130775974/japudufoboxewavinek.pdf
    • http://juravupog.clearwaterridingschool.co.nz/uploads/1/3/0/7/130776791/gukunedekidepopef.pdf
    • http://files.georgia-sabatier.com/uploads/1/3/1/1/131164479/pujizivomifixav_tamumevavox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/trick_house_oras.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/watewabux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/68369046014.pdf
    • https://cdn.shopify.com/s/files/1/0437/6182/8001/files/11717983603.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/90624303857.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7974/files/89006505315.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/7952322308.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/21521693855.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/97136426726.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/xejuremoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/93041473572.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/ansiolitico_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3254/files/kedufojazusokunizepuxema.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f6f.bin
d012541b27b900a11077184a8675c0fe87e8d6ed19e082d34c073b483135f04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 5408 bytes
font_01_sfnt_off000091bd.bin
b74c9006ba0c5f58b5c6b0be221902007a0cf7dd31430875e6283bbfb612f7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10376 bytes

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