Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea9e9c42c5c518f…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 22:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fecf76fc992afa597e1fde808bf41dc SHA-1: 1c036bec1f0c93632541d53ba9ddc3351276a681 SHA-256: cea9e9c42c5c518f0ef6b4b801d10e1e58034258bac958abb94c1508514fb846
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=furious+60+complete+cutting+guide+pdf+free', is designed to lure users to malicious infrastructure. The PDF also hosts a link farm of other PDFs, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=furious+60+complete+cutting+guide+pdf+free
    • http://jeromi.elenasuglia.com/uploads/1/3/1/6/131606490/5b24efd0be.pdf
    • http://nejekeruw.westpanguitch.com/uploads/1/3/1/4/131406686/e4ef5.pdf
    • http://jupufatog.alphagolfopen.org/uploads/1/3/1/4/131453060/xoxodivewatomaxaluxo.pdf
    • https://cdn.shopify.com/s/files/1/0452/0178/4983/files/xulikidevapivukuboponub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/rewemezubopotizetimojol.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/que_es_astigmatismo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/reditalasototiwuji.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/50730315596.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/aadu_valarpu_murai_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0439/9097/4622/files/march_banking_awareness_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/xodefiguwapoxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/kutopafuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/85346974220.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/41801918554.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_off00007839.bin
56d5e74bf431bf70085e591a8508de1ce61f81f204265856a98408ef6e9fb70c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 5516 bytes
font_01_sfnt_off00008ae7.bin
3eac97421774275bb0d070d12328c858bfaff91dfcb23fdfa8b0a6498c22ce64
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE7 10968 bytes