Malicious PDF — malware analysis report

Static analysis result for SHA-256 899fca43ed96f8ce…

MALICIOUS

PDF

49.0 KB Created: 2020-08-14 23:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03975d2a540f42027ae24bbf6beda50d SHA-1: ce1d373bc386c5318062c0028912198ae3e42b81 SHA-256: 899fca43ed96f8ce90c3b534b4d8a26d39a981e1f3b38a834a8823c134f70fd8
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.cc/pify?keyword=osrs+brutal+black+dragon+guide+2019', is identified as a malicious redirector. The majority of other links point to a Shopify domain, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=osrs+brutal+black+dragon+guide+2019
    • http://renusej.tiffanybank.net/uploads/1/3/1/8/131871721/kefonexu.pdf
    • http://regiletev.seacretspa-amsterdam.com/uploads/1/3/1/6/131606552/1458150.pdf
    • http://files.westerncanineacademy.ca/uploads/1/3/1/3/131383664/lobop.pdf
    • http://vosuruji.apparelfromhazy.com/uploads/1/3/2/6/132681352/resojokidof_mojugum_lixevin_mofiwik.pdf
    • http://mofezi.annagartshore.com/uploads/1/3/1/4/131437089/1509a2640.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/97356821243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/10063538994.pdf
    • https://cdn.shopify.com/s/files/1/0441/4518/0824/files/88884095431.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/buroxakupeparolem.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/xabiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/burger_king_printable_application.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/niligak.pdf
    • https://cdn.shopify.com/s/files/1/0439/3399/1080/files/bolt_of_linen_cloth.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/59529654345.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/logica_aristteles.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/januminutoxaxuwumapabogas.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/xojidarujijobesabovolixu.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_off000074b4.bin
d70d407c536dcf3d579a0c6863a7d0b6e784fcf1d5ea0c899b54b1b29f6197de
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 5820 bytes
font_01_sfnt_off0000888e.bin
8dc0ff1de90618535bc21f2c33ef515b394e7246c61faa65ce10c77ede7bb6dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x888E 15028 bytes