Malicious PDF — malware analysis report

Static analysis result for SHA-256 117426849e685474…

MALICIOUS

PDF

36.9 KB Created: 2020-08-02 22:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e6f8068f02022e2196daa40d13cba32 SHA-1: 878cbe2a7eec7f93780661ddf185719143ede335 SHA-256: 117426849e6854744d7adba0b7f67a74593e60305e8644fc2bdfb1600e5cec7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a redirector link to known malicious infrastructure. Another heuristic flags it as a link farm, suggesting a SEO manipulation or redirection scheme. The presence of a malicious redirector URL and a large number of external links indicates an attempt to lead users to potentially harmful content.

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=tyroil+smoochie+wallace
    • http://files.catcatblog.com/uploads/1/3/1/4/131452878/129315c.pdf
    • http://files.jmshairdesign.com/uploads/1/3/1/0/131070918/kadepepud.pdf
    • http://files.cliftonspringsps.vic.edu.au/uploads/1/3/1/4/131406386/2410335.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/66504460268.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/ganufumeniradibezederov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/fosapegufowuzeribumin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/98358472563.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/wewaratevanil.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/wotobusefotasuvuxudore.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9949/files/99880225008.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/midoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/60998615336.pdf
    • https://cdn.shopify.com/s/files/1/0433/8817/4497/files/xobipemevedoxeno.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005304.bin
7e58be59205bc84c92d023535d991f1210cb60f51f68e0a677ae6c17a71b8b80
pdf-font-stream PDF embedded font (sfnt) at offset 0x5304 5180 bytes
font_01_sfnt_off0000648d.bin
3f8f20716013982ea5ef36aa82c54c2016e3243fbff1080048b1c02690ddaeba
pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 10212 bytes