Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd4e998c4bf56b2…

MALICIOUS

PDF

38.2 KB Created: 2020-08-17 15:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c28499c3a59d59004598e356fdec4ff SHA-1: af87d16ac05bf36f5c6faa5c3ce2c701b5c26891 SHA-256: 3bd4e998c4bf56b25b8fb9a626c37e479e7172f496ed93191bae33995c096360
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One prominent link, 'https://ttraff.ru/pify?keyword=attire+guide+bridesmaid+vector', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a large number of links, including one to a known malicious redirector, suggests an attempt to lure users to potentially harmful sites.

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=attire+guide+bridesmaid+vector
    • http://files.annettesplacenz.com/uploads/1/3/1/3/131379743/boresenuradimil.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/segmentation_et_positionnement_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/fonubuwalizolir.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/2580795476.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6334/files/xuvato.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/tesaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/5572/7260/files/75457200055.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/57705874227.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/1943020807.pdf
    • https://cdn.shopify.com/s/files/1/0446/9247/1962/files/wall_chart_of_human_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/banking_and_financial_awareness_for_sbi_clerk_mains.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_off00005819.bin
6cb85633d9235e0645cefaa41a91579310b7c4411178762f5d14a6813ad9474a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5819 5416 bytes
font_01_sfnt_off00006a60.bin
cb99d39bd01eb0eaec6d09f7628c974f4a0b2b6a007ff77914412dc0dbb3c4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A60 9908 bytes

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