Malicious PDF — malware analysis report

Static analysis result for SHA-256 4171d5ddcbc33c1b…

MALICIOUS

PDF

34.3 KB Created: 2020-08-23 09:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a470c8bc10df226d718ff7259aac37e SHA-1: c07fee5af5488d086326a483c201bff37c0b88a7 SHA-256: 4171d5ddcbc33c1b0adc0c6897a16d7b87160221e51792f32a6d79227c54abda
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged for containing a large number of external links, many of which point to other PDFs hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=avicii+without+you+song+free', is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites or to distribute further malicious content through a link farm, potentially for SEO poisoning or to host malware.

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=avicii+without+you+song+free
    • http://files.marchdrumcorps.com/uploads/1/3/0/8/130813401/5263c0b7c4a949.pdf
    • http://files.katewestcott.com/uploads/1/3/0/9/130970003/fubepililovop_zutunup_jimon.pdf
    • http://files.striba.net/uploads/1/3/1/3/131380413/9297027.pdf
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/loverexaveroxipupibu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/11705132799.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/tratado_de_dermatologia_belda_3_edicao.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6952/files/maths_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/at_t_business_service_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/16204696440.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/wave_trend_oscillator.pdf
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/musimapawojasiduxikato.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/mifuranojusakepizudibeji.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/valivipemobubimuxafijil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/90754628024.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_off000047b5.bin
9c22e1d8780928dcfc6ed9096d32ba11d3b306dd8e4e571a3b6ce28f291dba33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47B5 5144 bytes
font_01_sfnt_off0000594d.bin
f528d4f8367380bd75c3440d016562a088e3ac83f00668881f84f2a4f8af18f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594D 10300 bytes

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