Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc07f591d213ca3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-03 21:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b696c5685dfff53713ddc6e6232f9872 SHA-1: 2f1a5864d1709d66c555958ab4bf289a3bbb9e59 SHA-256: ddc07f591d213ca3f1f909287fc9b09335c9684473a91d28b7bb0f83e19b35d8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=borislav+pekic+zlatno+runo+pdf', is identified as a known malicious redirector. The document body contains garbled text and embedded URLs, further supporting the malicious intent.

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=borislav+pekic+zlatno+runo+pdf
    • http://files.oharaconsulting.ca/uploads/1/3/2/7/132741339/zefumowetatujog.pdf
    • http://files.newspark901.org/uploads/1/3/2/8/132814958/2737278.pdf
    • http://files.krakatoamenu.com/uploads/1/3/1/4/131409200/gexesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/woreperufexojidebadawem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/root_external_2_internal_sd_card.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/fosiladifabidalese.pdf
    • https://cdn.shopify.com/s/files/1/0435/6859/5112/files/28066121757.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdf
    • https://cdn.shopify.com/s/files/1/0435/7573/8527/files/nawulijad.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/21137069113.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/gejimuvoboluwiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/bumegujarenap.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/vodedonazatinixomodozidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/18057434891.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/list_of_adjectives.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/13065706744.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_off00006179.bin
895f10ed67ac54a8307a02c47b3bfbc1b7b84efa98428343a863e19122067b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 5372 bytes
font_01_sfnt_off000073e3.bin
78f63aa5dde850ac03b19bdc7b7d4ad7e0a9c329ba6fab6a60955f5c012a0d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 10204 bytes

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