Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaea5f93c73c5d2…

MALICIOUS

PDF

47.9 KB Created: 2020-09-18 02:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe637cf8d6025275faa04888d8faa96 SHA-1: e125d893d3e63587a935d97bff1b5e0ec2a9b41e SHA-256: 7eaea5f93c73c5d26f04a607a3f5ab79ab96fd09770dd53adcab50b8305528de
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is part of a link farm, suggesting a spam or SEO poisoning campaign. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

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.link/wix?keyword=how+to+make+a+rapid+fire+crossbow+minecraft
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/bambukat_movie_utorrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/lidipirufomiruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/54662552104.pdf
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/john_deere_rx75_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/saxovoxajugepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/sabijebosiwolem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/1977_cessna_182_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/10951679489.pdf
    • https://cdn.shopify.com/s/files/1/0466/4223/3509/files/8157366072.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/87173366037.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/irony_worksheet_for_grade_5.pdf
    • https://185b6adc-85d7-4587-af74-1d150f555125.filesusr.com/ugd/724bd4_5e665b395c424484a180b7e27e4f25f9.pdf?index=true
    • https://fef3faf5-6ff5-44d0-8d3c-d06d635e6931.filesusr.com/ugd/5ea4d5_28f59946f3004e418dab679d6c4dcc90.pdf?index=true
    • https://d1fcb168-c980-41cc-9420-3ce0fa620aad.filesusr.com/ugd/d7d6cd_8cca2731bf7344d4a3574d4032b12e08.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006623.bin
0c02b3a1f87afb8b65189e5683e43ae7c655b35c1e5523e864f14d0e3b870400
pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 5524 bytes
font_01_sfnt_off000078e2.bin
4ee6863ee0ef34252cdf239dda74ef2cfd28314ce4b9087d3797c14e354cab3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E2 10644 bytes
font_02_sfnt_off00009d72.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 16092 bytes