Malicious PDF — malware analysis report

Static analysis result for SHA-256 974047d2ac15919f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-28 15:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b8acc82298b3bad15def9c2f7e4a3c7 SHA-1: 0cf755247842ed8104ea06e67b9b9499550337ea SHA-256: 974047d2ac15919f88f38453b55f1b7aa4a8f4f7f59d90db36868eac1c56aef2
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 benign Shopify URLs, but one critical link directs to a known malicious redirector infrastructure at `ttraff.ru`. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=glencoe+geometry+chapter+2+quiz+answ
    • http://batuju.bcschooltennis.net/uploads/1/3/2/6/132681556/gugimaxu.pdf
    • http://tobedi.dogoodmediamix.com/uploads/1/3/1/3/131382274/gebojuxulowuki.pdf
    • http://wemanobew.upstagenydanceacademy.com/uploads/1/3/0/9/130969525/lapubodujexu-pejitug-vanutizoju.pdf
    • http://ranotow.fuzzfaced.net/uploads/1/3/1/4/131438667/044447d2bd5.pdf
    • http://files.yippeewebdesign.com/uploads/1/3/2/7/132740533/8726418.pdf
    • https://cdn.shopify.com/s/files/1/0430/9263/9897/files/android_tivi_box_no_tt_nht.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/conjunction_exercises_with_answers_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/waburutugidejipimanug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/free_marketing_plan_template_for_small_business.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/bizejaridune.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/73039918122.pdf
    • https://cdn.shopify.com/s/files/1/0461/8639/7849/files/pupalujenaduxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/bosujabegifelafiju.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_off00005b84.bin
4e352a078618b98e5d855febfe0e55c2144bcbf906457f745a2e15e70b5c40df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B84 5880 bytes
font_01_sfnt_off00006f82.bin
e49b063cb30bffc5d26fb2548fdcef8c5391a9a0c1d95e17dc774f0cdef1ba0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 12624 bytes

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