Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d3ff6226ae9d31…

MALICIOUS

PDF

32.1 KB Created: 2020-08-19 02:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec6098f247e5f0b564d77d2e71fbfb24 SHA-1: 6dd3f831ff62114f52204037fa8b89a3b186bdbb SHA-256: 48d3ff6226ae9d3108047bf2b39aed12055e92dda1963bbadb3b1d3404d21aec
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the document is designed to lead users to potentially harmful external sites. The ML classifier also strongly suggests malicious intent. No scripts were extracted, and the document body was unreadable, but the URL analysis is sufficient to determine the attack pattern.

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.com/pify?keyword=large+dust+sheets+b%2526+q
    • http://files.jrbucheli.com/uploads/1/3/0/8/130874218/vegalufitemafozeret.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/22394767769.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/vipenerijivuvojupumale.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/jejabinim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/tedafujom.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/xibapogodinipovewaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/2446/3525/files/80776574536.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/69406424205.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/18913757289.pdf
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/dutukimakunibap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.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_off00004390.bin
eaee2c0cbdf0237dd883e89955366c5aaebbed6d3db139197b6ee8fb44246366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4390 4064 bytes
font_01_sfnt_off0000515e.bin
db5570c352d57a9ba1b9a5465f07bd3c958191b2b19bbe8712c121c092d4656b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x515E 10608 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.